tokens: You can fake a case-insensitive function name by defining all-lowercase function names and using bash 's trap for missing command names ( requires bash 4 , which you would need to install yourself on OS X ) :
ner_tags: O O O O O O O O O O O O O O B-Language O O O O O O O O B-Language B-Version O O O O O O O O O B-Operating_System I-Operating_System O O