Question: when did liverpool fans start singing you'll never walk alone
[{'answer': 'the early 1960s'}, {'provenance': [{'wikipedia_id': '284977', 'title': "You'll Never Walk Alone", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 190, 'bleu_score': 0.7576129078860151, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2327734845060207512}, 'section': 'Section::::Abstract.'}]}]