Question: who plays dr. spencer reid on criminal minds
[{'answer': 'Matthew Gray Gubler', 'provenance': [{'wikipedia_id': '4995125', 'title': 'Matthew Gray Gubler', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4995125', 'title': 'Matthew Gray Gubler', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 497, 'bleu_score': 0.674379704269181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2261852511773820020}, 'section': 'Section::::Abstract.'}]}]