Minor modifications

README.md

@@ -120,9 +120,11 @@ TBA
 
 ### Data Fields
 
-`sent1`: TBA
-
-`sent2`: TBA.
+`sent1`: a tokenized sentence
+`sent2`: another tokenized sentence, which is potentially a paraphrase of `sent1`.
+`annot_score`: a value between 1.0 and 4.0 indicating how good an example of paraphrases `sent1` and `sent2` are. (For the training sets, the value is 0.0, which indicates that no manual annotation has taken place.)
+`lang`: language of this dataset
+`gemi_id`: unique identifier of this entry
 
 ### Data Splits