Question: who plays dr harrison wells in the flash
[{'answer': 'Thomas Patrick Cavanagh'}, {'provenance': [{'wikipedia_id': '665708', 'title': 'Tom Cavanagh', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 392, 'bleu_score': 0.730687205749675, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15968733546797249086}, 'section': 'Section::::Abstract.'}]}]