Question: what year did elton john song crocodile rock
[{'answer': '1972', 'provenance': [{'wikipedia_id': '2724222', 'title': 'Crocodile Rock', 'start_paragraph_id': 1, 'start_character': 91, 'end_paragraph_id': 1, 'end_character': 95, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2724222', 'title': 'Crocodile Rock', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 679, 'bleu_score': 0.96401701927018, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3534335076005776806}, 'section': 'Section::::Abstract.'}]}]