Question: when did the labour party first come to power
[{'answer': '1945', 'provenance': [{'wikipedia_id': '16970510', 'title': 'History of the Labour Party (UK)', 'start_paragraph_id': 2, 'start_character': 286, 'end_paragraph_id': 2, 'end_character': 290, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]