tokens: followed by an opening bracket , followed by somthing not a closing bracket (( [ ^\ ] ] +)) which is also captured into \1 due to the parentheses , for reuse in the substitution
ner_tags: O O O O O O O O O O O O O B-Value I-Value I-Value I-Value B-Value I-Value O O O O O B-Value O O O O O O O O O O