Question: what is the world's tallest cantilevered observation wheel
[{'answer': 'London Eye', 'provenance': [{'wikipedia_id': '175541', 'title': 'Ferris wheel', 'start_paragraph_id': 41, 'start_character': 34, 'end_paragraph_id': 41, 'end_character': 44, 'bleu_score': 1.0, 'section': "Section::::World's tallest Ferris wheels.:Future wheels.\n"}]}, {'provenance': [{'wikipedia_id': '175541', 'title': 'Ferris wheel', 'start_paragraph_id': 76, 'start_character': 0, 'end_paragraph_id': 76, 'end_character': 818, 'bleu_score': 0.929484050811448, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4930669718889703119}, 'section': 'Section::::Observation wheels.\n'}]}]