tokens: Basically , what I need is to generate a matrix with boolean predicate ( i , j ) => j == y(i) .
ner_tags: O O O O O O O O O B-Data_Structure O B-Data_Type O B-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block B-Code_Block I-Code_Block I-Code_Block I-Code_Block O