Question: when did billy don't be a hero come out
[{'answer': '1974', 'provenance': [{'wikipedia_id': '2622356', 'title': "Billy Don't Be a Hero", 'start_paragraph_id': 1, 'start_character': 29, 'end_paragraph_id': 1, 'end_character': 33, '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': 17191452322096263703}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2622356', 'title': "Billy Don't Be a Hero", 'section': 'Section::::Abstract.', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['causing her to implore him: The song goes on to describe how Billy is killed in action in a pitched battle after volunteering to ride out and seek reinforcements. (This suggests mounted infantry and a lack of modern two-way radio communications.) In the end, the heartbroken woman throws away the official letter notifying her of Billy\'s "heroic" death. Paper Lace\'s version of "Billy Don\'t Be a Hero" reached No. 1 in the UK Singles Chart on 16 March 1974, and did likewise', 'Paper Lace\'s version of "Billy Don\'t Be a Hero" reached No. 1 in the UK Singles Chart on 16 March 1974,', '1974']}}]}, {'provenance': [{'wikipedia_id': '2622356', 'title': "Billy Don't Be a Hero", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"Billy Don\'t Be a Hero" is a 1974 pop song that was first a UK hit for Paper Lace and then, some months later, a US hit for Bo Donaldson and The Heywoods. The song was written and composed by two British songwriters, Mitch Murray and Peter Callander.', '"Billy Don\'t Be a Hero" is a 1974 pop song that was first a UK hit for Paper Lace and then, some months later, a US hit for Bo Donaldson and The Heywoods.', '1974']}}]}]