{
  "type": [
    { "match": { "isLiteRTPieceList": true }, "value": "bpe" },
    { "match": { "hasMerges": true }, "value": "bpe" },
    { "match": { "hasScores": true }, "value": "unigram" },
    { "match": {}, "value": "bpe" }
  ],
  "addDummyPrefix": [
    { "match": { "isLiteRTPieceList": true }, "value": false },
    { "match": {}, "value": true }
  ]
}