tokens: In that case you can send the file over FD #3 instead of standard input with while read -u3 .. . done 3 < Words.txt .
ner_tags: 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 I-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block O