Question: who sang billy don't be a hero first
[{'answer': 'Paper Lace', 'provenance': [{'wikipedia_id': '2622356', 'title': "Billy Don't Be a Hero", 'start_paragraph_id': 1, 'start_character': 71, 'end_paragraph_id': 1, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Bo Donaldson and The Heywoods', 'provenance': [{'wikipedia_id': '2622356', 'title': "Billy Don't Be a Hero", 'start_paragraph_id': 1, 'start_character': 124, 'end_paragraph_id': 1, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2622356', 'title': "Billy Don't Be a Hero", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 249, 'bleu_score': 0.959574895300321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3746438890645191227}, 'section': 'Section::::Abstract.'}]}]