tokens: where seq_len(.N) fills the role of seq_along and shift fills the role of c ( 0 , head ( cumsum(x) , -1 ) ) in the previous code .
ner_tags: O B-Function O O O O B-Function O B-Function O O O O B-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block B-Code_Block I-Code_Block I-Code_Block B-Code_Block B-Code_Block O O O O O