Question: who is believed to be the creator of hanging garden of babylon
[{'answer': 'King Nebuchadnezzar II', 'provenance': [{'wikipedia_id': '66786', 'title': 'Hanging Gardens of Babylon', 'start_paragraph_id': 2, 'start_character': 137, 'end_paragraph_id': 2, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '66786', 'title': 'Hanging Gardens of Babylon', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 422, 'bleu_score': 0.6844235358352171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2579697721937930807}, 'section': 'Section::::Abstract.'}]}]