Question: who sings ding dong the witch is dead in the wizard of oz
[{'answer': 'Munchkins', 'provenance': [{'wikipedia_id': '5651492', 'title': 'Ding-Dong! The Witch Is Dead', 'start_paragraph_id': 1, 'start_character': 120, 'end_paragraph_id': 1, 'end_character': 129, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Glinda', 'provenance': [{'wikipedia_id': '5651492', 'title': 'Ding-Dong! The Witch Is Dead', 'start_paragraph_id': 1, 'start_character': 131, 'end_paragraph_id': 1, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Dorothy Gale', 'provenance': [{'wikipedia_id': '5651492', 'title': 'Ding-Dong! The Witch Is Dead', 'start_paragraph_id': 1, 'start_character': 157, 'end_paragraph_id': 1, 'end_character': 169, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5651492', 'title': 'Ding-Dong! The Witch Is Dead', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 383, 'bleu_score': 0.9338603241255111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18201851510151878408}, 'section': 'Section::::Abstract.'}]}]