Question: when was adrian gonzalez traded to the mets
[{'answer': '2018', 'provenance': [{'wikipedia_id': '4572427', 'title': 'Adrián González', 'start_paragraph_id': 3, 'start_character': 585, 'end_paragraph_id': 3, 'end_character': 589, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]