Question: when did child benefit start in the uk
[{'answer': '1975', 'provenance': [{'wikipedia_id': '39018238', 'title': 'Child benefits in the United Kingdom', 'start_paragraph_id': 8, 'start_character': 3, 'end_paragraph_id': 8, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Family Allowance.\n'}]}, {'provenance': [{'wikipedia_id': '39018238', 'title': 'Child benefits in the United Kingdom', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 364, 'bleu_score': 0.8054165027813851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16131262920037326866}, 'section': 'Section::::Child Benefit and the end of child tax allowance.\n'}]}]