Question: when was the old world trade center built
[{'answer': 'between 1975 and 1985', 'provenance': [{'wikipedia_id': '45645094', 'title': 'World Trade Center (1973–2001)', 'start_paragraph_id': 2, 'start_character': 34, 'end_paragraph_id': 2, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45645094', 'title': 'World Trade Center (1973–2001)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 574, 'bleu_score': 0.578632839371327, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14003040321427888658}, 'section': 'Section::::Abstract.'}]}]