{
  "fields": [
    {
      "name": "source_title",
      "nullable": false,
      "type": "string"
    },
    {
      "name": "target_title",
      "nullable": false,
      "type": "string"
    },
    {
      "name": "target_exists",
      "nullable": false,
      "type": "bool"
    },
    {
      "name": "target_is_disambig",
      "nullable": false,
      "type": "bool"
    }
  ]
}