Question: who does the voice over for stewie in family guy
[{'answer': 'Seth MacFarlane', 'provenance': [{'wikipedia_id': '530189', 'title': 'Stewie Griffin', 'start_paragraph_id': 1, 'start_character': 140, 'end_paragraph_id': 1, 'end_character': 155, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '530189', 'title': 'Stewie Griffin', 'start_paragraph_id': 2, 'start_character': 47, 'end_paragraph_id': 2, 'end_character': 723, 'bleu_score': 0.650946915350545, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13721585176970450542}, 'section': 'Section::::Abstract.'}]}]