Question: who used to play meg on family guy
[{'answer': 'Lacey Chabert', 'provenance': [{'wikipedia_id': '723502', 'title': 'Meg Griffin', 'start_paragraph_id': 3, 'start_character': 21, 'end_paragraph_id': 3, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]