tokens: So if you do n't care about whether person.name is nil or not , just whether it contains a value of " John " , you can just write if person.name == " John " .
ner_tags: O O O O O O O O B-Variable O B-Value O O O O O O O O O O B-Value I-Value I-Value O O O O O B-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block I-Code_Block O