Question: when was income tax introduced in the uk
[{'answer': '1842', 'provenance': [{'wikipedia_id': '30443242', 'title': 'History of taxation in the United Kingdom', 'start_paragraph_id': 8, 'start_character': 685, 'end_paragraph_id': 8, 'end_character': 689, 'bleu_score': 1.0, 'section': 'Section::::From 1707.:Window tax.\n'}]}, {'provenance': [{'wikipedia_id': '30443242', 'title': 'History of taxation in the United Kingdom', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 764, 'bleu_score': 0.9839344367380701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13475436651502083237}, 'section': 'Section::::From 1707.:Window tax.\n'}]}]