Question: which film did matthew mcconaughey win an oscar
[{'answer': 'Dallas Buyers Club', 'provenance': [{'wikipedia_id': '42570065', 'title': 'List of awards and nominations received by Matthew McConaughey', 'start_paragraph_id': 3, 'start_character': 619, 'end_paragraph_id': 3, 'end_character': 637, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]