Question: when does winter occur in the northern hemisphere
[{'answer': 'December , January and February', 'provenance': [{'wikipedia_id': '34061', 'title': 'Winter', 'start_paragraph_id': 15, 'start_character': 76, 'end_paragraph_id': 15, 'end_character': 107, 'bleu_score': 1.0, 'section': 'Section::::Astronomical and other calendar-based reckoning.\n'}]}, {'provenance': [{'wikipedia_id': '34061', 'title': 'Winter', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 1655, 'bleu_score': 0.876760969242886, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13508543751415630364}, 'section': 'Section::::Meteorological reckoning.\n'}]}]