Question: who took the photo of the flag raising on iwo jima
[{'answer': 'Joe Rosenthal', 'provenance': [{'wikipedia_id': '450590', 'title': 'Raising the Flag on Iwo Jima', 'start_paragraph_id': 1, 'start_character': 62, 'end_paragraph_id': 1, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '450590', 'title': 'Raising the Flag on Iwo Jima', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 223, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16597483439984838891}, 'section': 'Section::::Abstract.'}]}]