Question: who is maria brother in west side story
[{'answer': 'Bernardo', 'provenance': [{'wikipedia_id': '38269958', 'title': 'Maria (West Side Story)', 'start_paragraph_id': 3, 'start_character': 113, 'end_paragraph_id': 3, 'end_character': 121, 'bleu_score': 1.0, 'section': 'Section::::Character summary.\n'}]}, {'provenance': [{'wikipedia_id': '38269958', 'title': 'Maria (West Side Story)', 'start_paragraph_id': 3, 'start_character': 93, 'end_paragraph_id': 3, 'end_character': 921, 'bleu_score': 0.672097667665662, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8622856837793644712}, 'section': 'Section::::Character summary.\n'}]}]