{
  "input" : [
    { "item" : "magmawall3", "count" : 20 },
    { "item" : "saltpeter", "count" : 4 }
  ],
  "output" : {
    "item" : "calciumnitrate",
    "count" : 2
  },
  "groups" : [ "chemlab", "compounds", "all" ]
}
