{
  "converter" : {
    "string_filter_types": {},
    "string_filter_rules":[],
    "num_filter_types": {},
    "num_filter_rules": [],
    "string_types": {},
    "string_rules":[
      {"key" : "*", "type" : "str", "sample_weight":"bin", "global_weight" : "bin"}
    ],
    "num_types": {},
    "num_rules": [
      {"key" : "*", "type" : "num"}
    ]
  },
  "parameter" : {
    "hash_num" : 64,
    "unlearner" : "lru",
    "unlearner_parameter" : {
      "max_size" : 2048
    }
  },
  "method": "lsh"
}

Add an example about lsh with unlearner
Add an example about lsh with unlearner
