Question: who is the ceo of t rowe price
[{'answer': 'William Stromberg', 'provenance': [{'wikipedia_id': '3990635', 'title': 'T. Rowe Price', 'start_paragraph_id': 27, 'start_character': 12, 'end_paragraph_id': 27, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Notable people.:Board of directors.\n'}]}, {'provenance': [{'wikipedia_id': '3990635', 'title': 'T. Rowe Price', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 65, 'bleu_score': 0.7860753021519781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8685479464840226207}, 'section': 'Section::::Notable people.:Board of directors.\n'}]}]