anchor.diff:  Flax Seed,Raw Material
   Wheat,Raw Material
   Flax Fiber,Raw Material
  -sand unknown,unknown
  +unknown,unknown
   Spider Silk,Raw Material
   Fieldstone,Building Material
   Brick,Building Material
  
positive.code: Iron Tipped Arrows,Weapon
  Bronze Tipped Arrows,Weapon
  Steel Tipped Arrows,Weapon
  unknown,unknown
  Stone Hammer,Hand Tool
  Iron Hammer,Hand Tool
  Bronze Hammer,Hand Tool
  
negative.code: unknown,unknown
  unknown,unknown
  unknown,unknown
  