Question: the collection of parallel lines and spaces on which notes are written
[{'answer': 'staff', 'provenance': [{'wikipedia_id': '2008475', 'title': 'Mensural notation', 'start_paragraph_id': 10, 'start_character': 387, 'end_paragraph_id': 10, 'end_character': 392, 'bleu_score': 1.0, 'section': 'Section::::Note values.:Rests.\n'}]}, {'provenance': [{'wikipedia_id': '2008475', 'title': 'Mensural notation', 'start_paragraph_id': 56, 'start_character': 0, 'end_paragraph_id': 56, 'end_character': 810, 'bleu_score': 0.986253478180058, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 156193642608454099}, 'section': 'Section::::Pitch notation.:Clefs.\n'}]}]