Question: who declared state of emergency in kenya in 1952
[{'answer': 'British', 'provenance': [{'wikipedia_id': '163054', 'title': 'Mau Mau Uprising', 'start_paragraph_id': 1, 'start_character': 133, 'end_paragraph_id': 1, 'end_character': 140, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '163054', 'title': 'Mau Mau Uprising', 'start_paragraph_id': 45, 'start_character': 0, 'end_paragraph_id': 45, 'end_character': 675, 'bleu_score': 0.982060959997838, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7438231795838975428}, 'section': 'Section::::British reaction.:British reaction to the uprising.\n'}]}]