Question: when was the at and t stadium built
[{'answer': '2009', 'provenance': [{'wikipedia_id': '6549393', 'title': 'AT&T Stadium', 'start_paragraph_id': 1, 'start_character': 217, 'end_paragraph_id': 1, 'end_character': 221, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6549393', 'title': 'AT&T Stadium', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 636, 'bleu_score': 0.9047102114515231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4445244448418841788}, 'section': 'Section::::Abstract.'}]}]