Question: rotating part of dc motor is known as
[{'answer': 'armature', 'provenance': [{'wikipedia_id': '2152318', 'title': 'Armature (electrical)', 'start_paragraph_id': 1, 'start_character': 30, 'end_paragraph_id': 1, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2152318', 'title': 'Armature (electrical)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 207, 'bleu_score': 0.9402297675816911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11471749138374467958}, 'section': 'Section::::Abstract.'}]}]