Question: when was the portrait of dorian gray written
[{'answer': 'July 1890', 'provenance': [{'wikipedia_id': '31342', 'title': 'The Picture of Dorian Gray', 'start_paragraph_id': 1, 'start_character': 111, 'end_paragraph_id': 1, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31342', 'title': 'The Picture of Dorian Gray', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 777, 'bleu_score': 0.908885798243758, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10202709349025283020}, 'section': 'Section::::Abstract.'}]}]