Question: what is the corporate tax rate in great britain
[{'answer': '20 %', 'provenance': [{'wikipedia_id': '594441', 'title': 'United Kingdom corporation tax', 'start_paragraph_id': 64, 'start_character': 704, 'end_paragraph_id': 64, 'end_character': 710, 'bleu_score': 1.0, 'section': 'Section::::Method of charge.:Rates and payment.\n'}]}, {'answer': 'a flat rate of 20 %'}, {'provenance': [{'wikipedia_id': '594441', 'title': 'United Kingdom corporation tax', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 799, 'bleu_score': 0.984904577301502, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3466674555639519609}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '594441', 'title': 'United Kingdom corporation tax', 'section': 'Section::::Method of charge.:Rates and payment.\n', 'start_paragraph_id': 64, 'end_paragraph_id': 64, 'meta': {'evidence_span': ['20%', 'FY07, and would pay 19% on the FY06 portion, and 20% on the FY07 portion']}}]}]