tokens: This may bring some " relief " on the line of O ( N* <num_distict_factors> ) , but again if <num_distict_factors> == N ( all primes ) , then it is still O(N*N)
ner_tags: 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 O O O O B-Code_Block I-Code_Block I-Code_Block O O O O O O O O O O