Question: who does the voice of american dad stan
[{'answer': 'Seth MacFarlane', 'provenance': [{'wikipedia_id': '2082680', 'title': 'List of American Dad! characters', 'start_paragraph_id': 6, 'start_character': 34, 'end_paragraph_id': 6, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Main characters.:Stan Smith.\n'}]}, {'provenance': [{'wikipedia_id': '2082680', 'title': 'List of American Dad! characters', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 2257, 'bleu_score': 0.994917366742263, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16866951922448903113}, 'section': 'Section::::Main characters.:Stan Smith.\n'}]}]