tokens: Not sure why , but I had to remove , target-densityDpi = device-dpi from the viewport tag to get this to work - the accepted answer did n't help me .
ner_tags: O O O O O O O O O B-Code_Block I-Code_Block I-Code_Block I-Code_Block O O B-User_Interface_Element O O O O O O O O O O O O O O O