Question: who is the writer of life of pi
[{'answer': 'Yann Martel', 'provenance': [{'wikipedia_id': '419078', 'title': 'Life of Pi', 'start_paragraph_id': 1, 'start_character': 52, 'end_paragraph_id': 1, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '419078', 'title': 'Life of Pi', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 368, 'bleu_score': 0.9425437476131631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7209921924917177705}, 'section': 'Section::::Abstract.'}]}]