Question: when did the bedroom tax came into force
[{'answer': '1 April 2013', 'provenance': [{'wikipedia_id': '38334258', 'title': 'Welfare Reform Act 2012', 'start_paragraph_id': 2, 'start_character': 88, 'end_paragraph_id': 2, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38334258', 'title': 'Welfare Reform Act 2012', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 683, 'bleu_score': 0.9828310228624961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4463849118781609094}, 'section': 'Section::::Abstract.'}]}]