tokens: It can traverse XML or JSON just fine like you say , but sending colossal XML documents with all possible data when only small amounts of the data is actually required will lead to massive overhead that will bring your app to its knees .
ner_tags: O O O B-Language O B-Language O O O O O O O O O B-Language O O O O O O O O O O O O O O O O O O O O O O O O O O O O O