{"pieces": [
    "fossil/skull_1",
    "fossil/skull_1_coal",
    "fossil/skull_2",
    "fossil/skull_2_coal",
    "fossil/skull_3",
    "fossil/skull_3_coal",
    "fossil/skull_4",
    "fossil/skull_4_coal",
    "fossil/spine_1",
    "fossil/spine_1_coal",
    "fossil/spine_2",
    "fossil/spine_2_coal",
    "fossil/spine_3",
    "fossil/spine_3_coal",
    "fossil/spine_4",
    "fossil/spine_4_coal"
]}