tokens: So in this worst case we have t_j = j and then you have a term with a sum from 2 to n of j which is O(n^2) .
ner_tags: O O O O O O O B-Code_Block I-Code_Block I-Code_Block 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 B-Code_Block O