Question: when did west virginia leave the big east
[{'answer': '2012', 'provenance': [{'wikipedia_id': '78024', 'title': 'Big East Conference (1979–2013)', 'start_paragraph_id': 3, 'start_character': 567, 'end_paragraph_id': 3, 'end_character': 571, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '78024', 'title': 'Big East Conference (1979–2013)', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 648, 'bleu_score': 0.9813933169956551, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2022693560616731946}, 'section': 'Section::::History.:Continued instability.\n'}]}]