Question: when was the google pixel 2 xl released
[{'answer': 'October 4 , 2017', 'provenance': [{'wikipedia_id': '55440889', 'title': 'Pixel 2', 'start_paragraph_id': 1, 'start_character': 167, 'end_paragraph_id': 1, 'end_character': 183, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55440889', 'title': 'Pixel 2', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 345, 'bleu_score': 0.8622690603479841, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4624122960439642261}, 'section': 'Section::::Abstract.'}]}]