Question: who is the mean lady in the wizard of oz
[{'answer': 'the Wicked Witch', 'provenance': [{'wikipedia_id': '589885', 'title': 'Margaret Hamilton (actress)', 'start_paragraph_id': 1, 'start_character': 154, 'end_paragraph_id': 1, 'end_character': 170, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '589885', 'title': 'Margaret Hamilton (actress)', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 430, 'bleu_score': 0.919557221389063, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13864715135494358327}, 'section': 'Section::::Film career.:"The Wizard of Oz".\n'}]}]