Question: which city in germany was divided into two sides
[{'answer': 'Berlin', 'provenance': [{'wikipedia_id': '261678', 'title': 'History of Germany (1945–1990)', 'start_paragraph_id': 5, 'start_character': 551, 'end_paragraph_id': 5, 'end_character': 557, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]