Question: what was on the top of the world trade center
[{'answer': 'a tall communication antenna', 'provenance': [{'wikipedia_id': '45645094', 'title': 'World Trade Center (1973–2001)', 'start_paragraph_id': 23, 'start_character': 119, 'end_paragraph_id': 23, 'end_character': 147, 'bleu_score': 1.0, 'section': 'Section::::Design and construction.:Design.\n'}]}, {'provenance': [{'wikipedia_id': '45645094', 'title': 'World Trade Center (1973–2001)', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 483, 'bleu_score': 0.9451526628827591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12402164843302111704}, 'section': 'Section::::Design and construction.:Design.\n'}]}]