Update README.md

README.md

@@ -42,6 +42,7 @@ The entire documents were collected from an open-source database at https://db.i
 - <code style="color : red"> dataset.py </code> return processed dataset that can be easily applied to general NLP models.
   - For monolingual setting: *KoreanDataset*, *HanjaDataset*
   - For Bilingual setting: *JointDataset*
+- <code style="color : red"> ner_map.json </code>, <code style="color : red"> label_map.json </code> is a mapping dictionary from label class to index.
 - Sequence level (SL) is a unit of sequence length for extracting self-contained sub-texts without losing context information for each relation in the text. Each folder SL-k indicates that SL is k.
 
 # Dataset usages