Question: who played the beaver in leave it to beaver
[{'answer': "`` Jerry '' Mathers"}, {'provenance': [{'wikipedia_id': '644602', 'title': 'Jerry Mathers', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 390, 'bleu_score': 0.747195940197068, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6212957192167766342}, 'section': 'Section::::Abstract.'}]}]