Update README.md

README.md

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 ## English Vossian Antonomasia Sequence Tagger
 
 This page presents a fine-tuned [BERT-base-cased](https://huggingface.co/bert-base-cased) language model for tagging Vossian Antonomasia expressions in text on word-level. 
-The tag {B,I}-SRC refers to the source chunk, {B,I}-MOD to the modifier chunk and {B,I}-TRG to the target chunk if existing.
+The tags {B,I}-SRC refers to the source chunks, {B,I}-MOD to the modifier chunks and {B,I}-TRG to the target chunks if existing. We used the IOB tagging format.
 
 
 ### Dataset