Question: how many seats in house of commons uk
[{'answer': '650', 'provenance': [{'wikipedia_id': '13828', 'title': 'House of Commons of the United Kingdom', 'start_paragraph_id': 2, 'start_character': 45, 'end_paragraph_id': 2, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]