Question: where is the final four 2018 being held
[{'answer': 'San Antonio', 'provenance': [{'wikipedia_id': '44536967', 'title': "2018 NCAA Division I Men's Basketball Tournament", 'start_paragraph_id': 1, 'start_character': 383, 'end_paragraph_id': 1, 'end_character': 394, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44536967', 'title': "2018 NCAA Division I Men's Basketball Tournament", 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 756, 'bleu_score': 0.950452577163977, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16493767501235289588}, 'section': 'Section::::2018 NCAA Tournament schedule and venues.\n'}]}]