tokens: it peforms static type reconstruction , meaning that the programmer does n't need to write types unless he wants to , the compiler will reconstruct them on its own ( this is also the case in Caml and SML , but not in Java or C ) ;
ner_tags: O O B-Data_Type O O O O O O O O O O O O O O O O O O O B-Application O O O O O O O O O O O O O B-Language O B-Language O O O O B-Language O B-Language O O