Question: when did lynyrd skynyrd open for the who
[{'answer': '1973', 'provenance': [{'wikipedia_id': '18713', 'title': 'Lynyrd Skynyrd', 'start_paragraph_id': 1, 'start_character': 597, 'end_paragraph_id': 1, 'end_character': 601, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18713', 'title': 'Lynyrd Skynyrd', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 984, 'bleu_score': 0.972902212337693, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 801173202003355035}, 'section': 'Section::::History.:Peak (1973–1977).\n'}]}]