[
    {
        "name": "Loom", "id": 0, "level": 0,
        "cost": [ 50, 150 ], "req_id": 100,
        "bonus": {
            "aff_id": [ 0 ],
            "defence": 0.25
        }
    },{
        "name": "Town Scouts", "id": 1, "level": 0,
        "cost": [ 50, 150 ], "req_id": 100,
        "bonus": {
            "aff_id": [ 100 ],
            "sight": 4
        }
    },{
        "name": "Leather Soles", "id": 2, "level": 0,
        "cost": [ 50, 150 ], "req_id": 100,
        "bonus": {
            "aff_id": [ 0 ],
            "move": 1
        }
    },{
        "name": "Weaponsmith", "id": 3, "level": 0,
        "cost": [ 50, 150 ], "req_id": 104,
        "bonus": {
            "aff_id": [ 1 ],
            "attack": 0.25
        }
    },{
        "name": "Town Watch", "id": 4, "level": 1,
        "cost": [ 95, 280 ], "req_id": 100,
        "bonus": {
            "aff_id": [ 100 ],
            "defence": 0.2, "sight": 2
        }
    },{
        "name": "Wheelbarrow", "id": 5, "level": 1,
        "cost": [ 125, 375 ], "req_id": 100,
        "bonus": {
            "aff_class": [ "bld" ],
            "cost": [ -0.1, -0.1 ]
        }
    },{
        "name": "Advanced Mining", "id": 6, "level": 1,
        "cost": [ 95, 280 ], "req_id": 102,
        "bonus": {
            "aff_id": [ 102 ],
            "prod": [ 0, 0.15 ]
        }
    },{
        "name": "Horse Collar", "id": 7, "level": 1,
        "cost": [ 95, 280 ], "req_id": 101,
        "bonus": {
            "prod": [ 0.15, 0 ]
        }
    },{
        "name": "Scale Mail Armor", "id": 8, "level": 1,
        "cost": [ 95, 280 ], "req_id": 106,
        "bonus": {
            "aff_class": [ "inf" ],
            "aff_level": 1,
            "defence": 0.25
        }
    },{
        "name": "Scale Barding", "id": 9, "level": 1,
        "cost": [ 95, 280 ], "req_id": 106,
        "bonus": {
            "aff_class": [ "cav" ],
            "aff_level": 1,
            "defence": 0.25
        }
    },{
        "name": "Fletching", "id": 10, "level": 1,
        "cost": [ 95, 280 ], "req_id": 106,
        "bonus": {
            "aff_class": [ "ran" ],
            "aff_level": 1,
            "attack": 0.25
        }
    },{
        "name": "Padded Armor", "id": 11, "level": 1,
        "cost": [ 95, 280 ], "req_id": 106,
        "bonus": {
            "aff_class": [ "ran" ],
            "aff_level": 1,
            "defence": 0.25
        }
    },{
        "name": "Forging", "id": 12, "level": 1,
        "cost": [ 155, 470 ], "req_id": 106,
        "bonus": {
            "aff_class": [ "inf", "cav" ],
            "aff_level": 1,
            "attack": 0.25
        }
    },{
        "name": "Tracking", "id": 13, "level": 1,
        "cost": [ 95, 280 ], "req_id": 104,
        "bonus": {
            "aff_class": [ "inf" ],
            "sight": 2
        }
    },{
        "name": "Cartography", "id": 14, "level": 1,
        "cost": [ 95, 280 ], "req_id": 107,
        "bonus": {
            "sight": 1
        }
    },{
        "name": "Trading", "id": 15, "level": 1,
        "cost": [ 95, 280 ], "req_id": 107,
        "bonus": {
            "trade": 1
        }
    },{
        "name": "Coniage", "id": 16, "level": 1,
        "cost": [ 125, 375 ], "req_id": 107,
        "bonus": {
            "prod": [ 0, 0.1 ]
        }
    },{
        "name": "Town Patrol", "id": 17, "level": 2,
        "cost": [ 150, 450 ], "req_id": 100,
        "bonus": {
            "aff_id": [ 100 ],
            "defence": 0.2, "sight": 2
        }
    },{
        "name": "Hand Cart", "id": 18, "level": 2,
        "cost": [ 150, 450 ], "req_id": 100,
        "bonus": {
            "aff_class": [ "bld" ],
            "cost": [ -0.1, -0.1 ]
        }
    },{
        "name": "Shaft Mining", "id": 19, "level": 2,
        "cost": [ 150, 450 ], "req_id": 102,
        "bonus": {
            "aff_id": [ 102 ],
            "prod": [ 0, 0.15 ]
        }
    },{
        "name": "Heavy Plow", "id": 20, "level": 2,
        "cost": [ 150, 450 ], "req_id": 101,
        "bonus": {
            "prod": [ 0.1, 0 ]
        }
    },{
        "name": "Chain Mail Armor", "id": 21, "level": 2,
        "cost": [ 150, 450 ], "req_id": 106,
        "bonus": {
            "aff_level": 2,
            "aff_class": [ "inf" ],
            "defence": 0.25
        }
    },{
        "name": "Chain Barding", "id": 22, "level": 2,
        "cost": [ 150, 450 ], "req_id": 106,
        "bonus": {
            "aff_level": 2,
            "aff_class": [ "cav" ],
            "defence": 0.25
        }
    },{
        "name": "Bodkin Arrow", "id": 23, "level": 2,
        "cost": [ 150, 450 ], "req_id": 106,
        "bonus": {
            "aff_level": 2,
            "aff_class": [ "ran" ],
            "attack": 0.25
        }
    },{
        "name": "Leather Armor", "id": 24, "level": 2,
        "cost": [ 150, 450 ], "req_id": 106,
        "bonus": {
            "aff_level": 2,
            "aff_class": [ "ran" ],
            "defence": 0.25
        }
    },{
        "name": "Iron Casting", "id": 25, "level": 2,
        "cost": [ 250, 750 ], "req_id": 106,
        "bonus": {
            "aff_level": 2,
            "aff_class": [ "inf", "cav" ],
            "attack": 0.25
        }
    },{
        "name": "Conscription", "id": 26, "level": 2,
        "cost": [ 150, 450 ], "req_id": 104,
        "bonus": {
            "aff_class": [ "inf" ],
            "cost_abs": [ -15, -15 ]
        }
    },{
        "name": "Husbandry", "id": 27, "level": 2,
        "cost": [ 150, 450 ], "req_id": 108,
        "bonus": {
            "aff_class": [ "cav" ],
            "cost_abs": [ -15, -15 ]
        }
    },{
        "name": "Tournaments", "id": 28, "level": 2,
        "cost": [ 150, 450 ], "req_id": 105,
        "bonus": {
            "aff_class": [ "ran" ],
            "cost_abs": [ -15, -15 ]
        }
    },{
        "name": "Mechanics Guild", "id": 29, "level": 2,
        "cost": [ 150, 450 ], "req_id": 109,
        "bonus": {
            "aff_class": [ "sie" ],
            "cost_abs": [ -15, -15 ]
        }
    },{
        "name": "Banking", "id": 30, "level": 2,
        "cost": [ 200, 600 ], "req_id": 107,
        "bonus": {
            "trade": 1,
            "prod": [ 0, 0.05 ]
        }
    },{
        "name": "Merchant Network", "id": 31, "level": 2,
        "cost": [ 150, 450 ], "req_id": 107
    },{
        "name": "Redemption", "id": 32, "level": 2,
        "cost": [ 150, 450 ], "req_id": 110,
        "bonus": {
            "aff_id": [ 23 ],
            "improved_heal": 1
        }
    },{
        "name": "Fervor", "id": 33, "level": 2,
        "cost": [ 150, 450 ], "req_id": 110,
        "bonus": {
            "aff_id": [ 23 ],
            "improved_convert": 1
        }
    },{
        "name": "Sanctity", "id": 34, "level": 2,
        "cost": [ 150, 450 ], "req_id": 110,
        "bonus": {
            "aff_id": [ 23 ],
            "defence": 0.25
        }
    },{
        "name": "Murder Holes", "id": 35, "level": 2,
        "cost": [ 95, 280 ], "req_id": 111,
        "bonus": {
            "aff_id": [ 112 ],
            "defence": 0.25
        }
    },{
        "name": "Masonry", "id": 36, "level": 2,
        "cost": [ 95, 280 ], "req_id": 111,
        "bonus": {
            "aff_class": [ "bld" ],
            "defence": 0.05
        }
    },{
        "name": "Crop Rotation", "id": 37, "level": 3,
        "cost": [ 250, 750 ], "req_id": 101,
        "bonus": {
            "prod": [ 0.1, 0 ]
        }
    },{
        "name": "Plate Mail", "id": 38, "level": 3,
        "cost": [ 250, 750 ], "req_id": 106,
        "bonus": {
            "aff_level": 3,
            "aff_class": [ "inf" ],
            "defence": 0.25
        }
    },{
        "name": "Plate Barding", "id": 39, "level": 3,
        "cost": [ 250, 750 ], "req_id": 106,
        "bonus": {
            "aff_level": 3,
            "aff_class": [ "cav" ],
            "defence": 0.25
        }
    },{
        "name": "Bracers", "id": 40, "level": 3,
        "cost": [ 250, 750 ], "req_id": 106,
        "bonus": {
            "aff_level": 3,
            "aff_class": [ "ran" ],
            "attack": 0.25
        }
    },{
        "name": "Ring Archer Armor", "id": 41, "level": 3,
        "cost": [ 250, 750 ], "req_id": 106,
        "bonus": {
            "aff_level": 3,
            "aff_class": [ "ran" ],
            "defence": 0.25
        }
    },{
        "name": "Blast Furnace", "id": 42, "level": 3,
        "cost": [ 625, 975 ], "req_id": 106,
        "bonus": {
            "aff_level": 3,
            "aff_class": [ "inf", "cav" ],
            "attack": 0.25
        }
    },{
        "name": "Arena", "id": 43, "level": 3,
        "cost": [ 250, 750 ], "req_id": 104
    },{
        "name": "Squires", "id": 44, "level": 3,
        "cost": [ 250, 750 ], "req_id": 108
    },{
        "name": "Flaming Arrows", "id": 45, "level": 3,
        "cost": [ 300, 900 ], "req_id": 105
    },{
        "name": "Sappers", "id": 46, "level": 3,
        "cost": [ 300, 900 ], "req_id": 113
    },{
        "name": "Hoardings", "id": 47, "level": 3,
        "cost": [ 250, 750 ], "req_id": 113, 
        "bonus": {
            "aff_id": [ 113 ],
            "defence": 0.35
        }
    },{
        "name": "Spies", "id": 48, "level": 3,
        "cost": [ 300, 900 ], "req_id": 113
    },{
        "name": "Guilds", "id": 49, "level": 3,
        "cost": [ 250, 750 ], "req_id": 107, 
        "bonus": {
            "trade": 1,
            "prod": [ 0, 0.05 ]
        }
    },{
        "name": "Atonement", "id": 50, "level": 3,
        "cost": [ 250, 750 ], "req_id": 110, 
        "bonus": {
            "aff_id": [ 23 ],
            "improved_heal": 1
        }
    },{
        "name": "Block Printing", "id": 51, "level": 3,
        "cost": [ 250, 750 ], "req_id": 110, 
        "bonus": {
            "aff_id": [ 23 ],
            "improved_convert": 1
        }
    },{
        "name": "Illumination", "id": 52, "level": 3,
        "cost": [ 250, 750 ], "req_id": 110, 
        "bonus": {
            "aff_id": [ 110 ],
            "prod": [ 0, 0.5 ]
        }
    },{
        "name": "Faith", "id": 53, "level": 3,
        "cost": [ 250, 750 ], "req_id": 110, 
        "bonus": {
            "aff_id": [ 23 ],
            "defence": 0.25
        }
    },{
        "name": "Treadmill Crane", "id": 54, "level": 3,
        "cost": [ 250, 750 ], "req_id": 111, 
        "bonus": {
            "aff_class": [ "bld" ],
            "cost": [ 0.1, 0.1 ]
        }
    },{
        "name": "Siege Engineers", "id": 55, "level": 3,
        "cost": [ 250, 750 ], "req_id": 111
    },{
        "name": "Architecture", "id": 56, "level": 3,
        "cost": [ 250, 750 ], "req_id": 111, 
        "bonus": {
            "aff_class": [ "bld" ],
            "defence": 0.05
        }
    },{
        "name": "Chemistry", "id": 57, "level": 3,
        "cost": [ 250, 750 ], "req_id": 111
    },{
        "name": "Ballistics", "id": 58, "level": 3,
        "cost": [ 300, 900 ], "req_id": 111, 
        "bonus": {
            "aff_class": [ "sie" ],
            "req_range": 1,
            "attack": 0.25
        }
    }
]