tokens: Here , you can see that an optional + or - is matched first ( [ -+ ] ?) , then the same pattern as above is used , then comes an optional non-capturing group ( ? : .. . ) ? that matches 1 or 0 occurrences of the following sequence : e or E ( since /i is a case insensitive modifier ) , [ -+ ] ? matches an optional + or - , and \d+` matches 1+ digits .
ner_tags: O O O O O O O O B-Code_Block O B-Code_Block O O O O B-Code_Block I-Code_Block I-Code_Block I-Code_Block O O O O O O O O O O O O O O O O B-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block O O O O O O O O O O O B-Code_Block O B-Code_Block O O B-Code_Block O O O O O O O B-Code_Block I-Code_Block I-Code_Block B-Code_Block O O O B-Code_Block O B-Code_Block O O B-Code_Block O O O O