Question: who was defeated by vaman avatar of vishnu
[{'answer': 'Mahabali ,', 'provenance': [{'wikipedia_id': '100137', 'title': 'Vamana', 'start_paragraph_id': 15, 'start_character': 74, 'end_paragraph_id': 15, 'end_character': 86, 'bleu_score': 1.0, 'section': 'Section::::Symbolism.:Onam festival.\n'}]}, {'provenance': [{'wikipedia_id': '100137', 'title': 'Vamana', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 970, 'bleu_score': 0.9873810715615521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 177652051318158231}, 'section': 'Section::::Abstract.'}]}]