Question: who killed the wicked witch of the west
[{'answer': 'Dorothy', 'provenance': [{'wikipedia_id': '933294', 'title': 'Wicked Witch of the West', 'start_paragraph_id': 4, 'start_character': 458, 'end_paragraph_id': 4, 'end_character': 465, 'bleu_score': 1.0, 'section': "Section::::In Baum's books.\n"}]}, {'provenance': [{'wikipedia_id': '933294', 'title': 'Wicked Witch of the West', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 929, 'bleu_score': 0.9879148529393721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9388473087635559427}, 'section': "Section::::In Baum's books.\n"}]}]