Question: where is robb stark in season 3 episode 1
[{'answer': 'Harrenhal', 'provenance': [{'wikipedia_id': '38917409', 'title': 'Valar Dohaeris', 'start_paragraph_id': 17, 'start_character': 14, 'end_paragraph_id': 17, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Plot.:At Dragonstone.\n'}]}]