Updated the description for the tagsets.

README.md

@@ -67,7 +67,7 @@ Switzerland has four official languages with three languages German, French and
 ```
 decision_id:
 considerations: 
-NER_labels: CITATION = case citation or reference to another court decision; LAW = reference to a law; O = None of the previous two labels
+NER_labels: CITATION refers to a case citation or a reference to another court decision. LAW indicates a reference to a specific law. O is used for words or tokens that don't fall under the previous two labels. In accordance with the IOB format, each tag, apart from 'O', is accompanied by the 'B-' prefix if it marks the beginning of the span, or the 'I-' prefix if it's inside or at the end of the span.
 law_area: (string)
 language: (string)
 year: (int64)