Question: what was the double-reed wind instrument that was an important part of ancient greek music
[{'answer': 'The tibia', 'provenance': [{'wikipedia_id': '4217861', 'title': 'Music of ancient Rome', 'start_paragraph_id': 1, 'start_character': 327, 'end_paragraph_id': 1, 'end_character': 337, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4217861', 'title': 'Music of ancient Rome', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 509, 'bleu_score': 0.9751504244977051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6319936792703458884}, 'section': 'Section::::Musical notation.:Wind instruments.\n'}]}]