Question: who played robb stark in the game of thrones
[{'answer': 'Richard Madden', 'provenance': [{'wikipedia_id': '28013756', 'title': 'Richard Madden', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]