Question: who does the voice of mort on family guy
[{'answer': 'Johnny Brennan', 'provenance': [{'wikipedia_id': '162720', 'title': 'Johnny Brennan', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '162720', 'title': 'Johnny Brennan', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 651, 'bleu_score': 0.935048841810844, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4445900272965689778}, 'section': 'Section::::Abstract.'}]}]