{
  "item":
  [
    ["chemical-boiler", "stone-chemical-furnace"],
    ["chemical-steel-furnace", "steel-chemical-furnace"],
    ["chemical-furnace", "electric-chemical-furnace"],

    ["mixing-furnace", "stone-mixing-furnace"],
    ["mixing-steel-furnace", "steel-mixing-furnace"],
    ["mixing-steel-furnace", "steel-mixing-furnace"]
  ],
  "recipe":
  [
    ["chemical-boiler", "stone-chemical-furnace"],
    ["chemical-steel-furnace", "steel-chemical-furnace"],
    ["chemical-furnace", "electric-chemical-furnace"],

    ["mixing-furnace", "stone-mixing-furnace"],
    ["mixing-steel-furnace", "steel-mixing-furnace"],
    ["mixing-steel-furnace", "steel-mixing-furnace"],


    ["mixing-furnace-from-stone-furnace", "stone-mixing-furnace-from-stone-furnace"],
    ["chemical-furnace-from-stone-furnace", "stone-chemical-furnace-from-stone-furnace"],
    ["mixing-steel-furnace-from-steel-furnace", "steel-mixing-furnace-from-steel-furnace"],
    ["chemical-steel-furnace-from-steel-furnace", "steel-chemical-furnace-from-steel-furnace"],

    ["stone-furnace-from-chemical-furnace", "stone-furnace-from-stone-chemical-furnace"],
    ["stone-furnace-from-mixing-furnace", "stone-furnace-from-stone-mixing-furnace"],
    ["steel-furnace-from-chemical-steel-furnace", "steel-furnace-from-steel-chemical-furnace"],
    ["steel-furnace-from-mixing-steel-furnace", "steel-furnace-from-steel-mixing-furnace"]
  ],
  "entity":
  [
    ["chemical-boiler", "stone-chemical-furnace"],
    ["chemical-steel-furnace", "steel-chemical-furnace"],
    ["chemical-furnace", "electric-chemical-furnace"],

    ["mixing-furnace", "stone-mixing-furnace"],
    ["mixing-steel-furnace", "steel-mixing-furnace"],
    ["mixing-steel-furnace", "steel-mixing-furnace"]
  ],
  "technology":
  [
    ["mixing-steel-furnace", "steel-mixing-furnace"],
    ["chemical-steel-furnace", "steel-chemical-furnace"]
  ]
}