Question: when are the oakland raiders going to las vegas
[{'answer': 'March 27 , 2017', 'provenance': [{'wikipedia_id': '53617421', 'title': 'Oakland Raiders relocation to Las Vegas', 'start_paragraph_id': 54, 'start_character': 157, 'end_paragraph_id': 54, 'end_character': 172, 'bleu_score': 1.0, 'section': 'Section::::Relocation to Las Vegas.\n'}]}, {'provenance': [{'wikipedia_id': '53617421', 'title': 'Oakland Raiders relocation to Las Vegas', 'start_paragraph_id': 54, 'start_character': 0, 'end_paragraph_id': 54, 'end_character': 656, 'bleu_score': 0.590178097970822, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16083803394186959463}, 'section': 'Section::::Relocation to Las Vegas.\n'}]}]