Question: when was wind energy first used to generate electricity
[{'answer': '1887', 'provenance': [{'wikipedia_id': '8312093', 'title': 'History of wind power', 'start_paragraph_id': 18, 'start_character': 92, 'end_paragraph_id': 18, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::19th century.\n'}]}, {'provenance': [{'wikipedia_id': '8312093', 'title': 'History of wind power', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 953, 'bleu_score': 0.9873810715615521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15590849649638528842}, 'section': 'Section::::19th century.\n'}]}]