Question: when was the winter fuel payment first introduced
[{'answer': '1997', 'provenance': [{'wikipedia_id': '41071825', 'title': 'Winter Fuel Payment', 'start_paragraph_id': 1, 'start_character': 243, 'end_paragraph_id': 1, 'end_character': 247, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41071825', 'title': 'Winter Fuel Payment', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 357, 'bleu_score': 0.8992703646237251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4272924528330961529}, 'section': 'Section::::Abstract.'}]}]