Question: when did the bus stop dance come out
[{'answer': "Spring of ' 76", 'provenance': [{'wikipedia_id': '262797', 'title': 'Line dance', 'start_paragraph_id': 16, 'start_character': 665, 'end_paragraph_id': 16, 'end_character': 681, 'bleu_score': 1.0, 'section': 'Section::::History.:1950s-1970s.\n'}]}, {'provenance': [{'wikipedia_id': '262797', 'title': 'Line dance', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 735, 'bleu_score': 0.984789766484456, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1632062315738090080}, 'section': 'Section::::History.:1950s-1970s.\n'}]}]