Question: when did filming for game of thrones start
[{'answer': '2009', 'provenance': [{'wikipedia_id': '20715044', 'title': 'Game of Thrones', 'start_paragraph_id': 29, 'start_character': 338, 'end_paragraph_id': 29, 'end_character': 342, 'bleu_score': 1.0, 'section': 'Section::::Production.:Conception and development.\n'}]}, {'provenance': [{'wikipedia_id': '20715044', 'title': 'Game of Thrones', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 491, 'bleu_score': 0.903379343865313, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10725404853166124551}, 'section': 'Section::::Production.:Conception and development.\n'}]}]