Question: which is the shortest day in the southern hemisphere
[{'answer': 'winter solstice', 'provenance': [{'wikipedia_id': '8521120', 'title': 'Winter solstice', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]