Question: name given to collapsed world trade center site
[{'answer': 'World Trade Center site', 'provenance': [{'wikipedia_id': '67173', 'title': 'World Trade Center site', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ground Zero', 'provenance': [{'wikipedia_id': '67173', 'title': 'World Trade Center site', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '67173', 'title': 'World Trade Center site', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 519, 'bleu_score': 0.5539586856687541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1551634543280872128}, 'section': 'Section::::Abstract.'}]}]