Question: who plays the voice of steve on american dad
[{'answer': 'Steve Smith', 'provenance': [{'wikipedia_id': '512157', 'title': 'Scott Grimes', 'start_paragraph_id': 1, 'start_character': 302, 'end_paragraph_id': 1, 'end_character': 313, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '512157', 'title': 'Scott Grimes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 498, 'bleu_score': 0.835631992293358, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9565565205628237235}, 'section': 'Section::::Abstract.'}]}]