tokens: In your case : queue < - new can run at any time , and it turns out to run after you 've gone through the for _ , new loop entirely .
ner_tags: 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 O O B-Code_Block I-Code_Block I-Code_Block I-Code_Block O O O