Question: who sang the song easy come easy go
[{'answer': 'Cass Elliot', 'provenance': [{'wikipedia_id': '51061933', 'title': 'Easy Come, Easy Go (Bobby Sherman song)', 'start_paragraph_id': 2, 'start_character': 31, 'end_paragraph_id': 2, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Bobby Sherman', 'provenance': [{'wikipedia_id': '51061933', 'title': 'Easy Come, Easy Go (Bobby Sherman song)', 'start_paragraph_id': 0, 'start_character': 20, 'end_paragraph_id': 0, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51061933', 'title': 'Easy Come, Easy Go (Bobby Sherman song)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 279, 'bleu_score': 0.9603762111511761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9257028613707599356}, 'section': 'Section::::Abstract.'}]}]