tokens: Serialization is the process of transforming a graph of objects to a byte array , in order to save it on disk , or send it to another JVM over the network , for example .
ner_tags: O O O O O O O B-Data_Structure O O O O B-Data_Structure I-Data_Structure O O O O O O O B-Device O O O O O O B-Application O O O O O O O