Question: who was the creator of tom and jerry
[{'answer': 'William Hanna', 'provenance': [{'wikipedia_id': '871053', 'title': 'Tom and Jerry', 'start_paragraph_id': 1, 'start_character': 86, 'end_paragraph_id': 1, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Joseph Barbera', 'provenance': [{'wikipedia_id': '871053', 'title': 'Tom and Jerry', 'start_paragraph_id': 1, 'start_character': 104, 'end_paragraph_id': 1, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '871053', 'title': 'Tom and Jerry', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 247, 'bleu_score': 0.614482798114066, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4345050714224643034}, 'section': 'Section::::Abstract.'}]}]