Question: who played mary ellen on leave it to beaver
[{'answer': 'Pamela Baird', 'provenance': [{'wikipedia_id': '12115190', 'title': 'Pamela Baird', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12115190', 'title': 'Pamela Baird', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 526, 'bleu_score': 0.979054689945215, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4668386560595028343}, 'section': 'Section::::Abstract.'}]}]