tokens: You need that if you have any compiled Java source files ( e.g . classes ) in your local tree ( for example , when developing , you might have your Main , or some other , class in your current directory ) .
ner_tags: O O O O O O O O B-Language O O O O O O O O O O O O O O O O O O O O O O B-Class O O O O O O O O O O O O