Question: who wrote if i had a hammer song
[{'answer': 'Pete Seeger', 'provenance': [{'wikipedia_id': '2301865', 'title': 'If I Had a Hammer', 'start_paragraph_id': 1, 'start_character': 59, 'end_paragraph_id': 1, 'end_character': 70, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Lee Hays', 'provenance': [{'wikipedia_id': '2301865', 'title': 'If I Had a Hammer', 'start_paragraph_id': 1, 'start_character': 75, 'end_paragraph_id': 1, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2301865', 'title': 'If I Had a Hammer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 397, 'bleu_score': 0.9738505480425671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16479032699439791722}, 'section': 'Section::::Abstract.'}]}]