Question: which is taller empire state or sears tower
[{'answer': 'Sears Tower', 'provenance': [{'wikipedia_id': '334804', 'title': 'List of tallest buildings in the United States', 'start_paragraph_id': 2, 'start_character': 531, 'end_paragraph_id': 2, 'end_character': 542, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]