Question: who sings its a sign of the times
[{'answer': 'The Belle Stars', 'provenance': [{'wikipedia_id': '45207722', 'title': 'Sign of the Times (The Belle Stars song)', 'start_paragraph_id': 0, 'start_character': 19, 'end_paragraph_id': 0, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45207722', 'title': 'Sign of the Times (The Belle Stars song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 587, 'bleu_score': 0.6935852892543211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6862635067423528722}, 'section': 'Section::::Abstract.'}]}]