input: 501st Infantry Regiment [SEP] instance of
meta.obj_surface: pułk regiment
meta.sub_surface: 501st PIR 501st Infantry Regiment 501st Parachute Infantry Regiment
output.answer: regiment
output.annotation_id: -1
output.section: Section::::Abstract.
output.title: 501st Infantry Regiment (United States)
output.wikipedia_id: 6885226
output.answer: rgt
output.answer: military regiment
output.answer: regt.