tokens: There are lots of Apps , each of which will produce PDFs , so it made sense to have a class , that launches Chrome , makes a connection to it , and kills the Chrome process when the class is deleted .
ner_tags: O O O O O O O O O O O B-File_Type O O O O O O O O O O O O B-Application O O O O O O O O O O B-Application O O O O O O O