Question: when does it usually stop snowing in chicago
[{'answer': 'May', 'provenance': [{'wikipedia_id': '1401501', 'title': 'Climate of Chicago', 'start_paragraph_id': 1, 'start_character': 614, 'end_paragraph_id': 1, 'end_character': 617, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]