Question: who sings that was then this is now
[{'answer': 'The Monkees', 'provenance': [{'wikipedia_id': '17858858', 'title': 'That Was Then, This Is Now (song)', 'start_paragraph_id': 1, 'start_character': 242, 'end_paragraph_id': 1, 'end_character': 253, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17858858', 'title': 'That Was Then, This Is Now (song)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 437, 'bleu_score': 0.514853680211795, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14205855579031862457}, 'section': 'Section::::Background.\n'}]}]