Question: who played sir gregor in game of thrones
[{'answer': 'Conan Stevens', 'provenance': [{'wikipedia_id': '1316115', 'title': 'Gregor Clegane', 'start_paragraph_id': 3, 'start_character': 87, 'end_paragraph_id': 3, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ian Whyte', 'provenance': [{'wikipedia_id': '1316115', 'title': 'Gregor Clegane', 'start_paragraph_id': 3, 'start_character': 135, 'end_paragraph_id': 3, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Hafþór Júlíus Björnsson', 'provenance': [{'wikipedia_id': '1316115', 'title': 'Gregor Clegane', 'start_paragraph_id': 3, 'start_character': 190, 'end_paragraph_id': 3, 'end_character': 213, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1316115', 'title': 'Gregor Clegane', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 257, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17031467633655658364}, 'section': 'Section::::Abstract.'}]}]