Question: when was daylight savings invented in the us
[{'answer': '1918', 'provenance': [{'wikipedia_id': '47548', 'title': 'Daylight saving time', 'start_paragraph_id': 14, 'start_character': 555, 'end_paragraph_id': 14, 'end_character': 559, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '47548', 'title': 'Daylight saving time', 'start_paragraph_id': 14, 'start_character': 208, 'end_paragraph_id': 14, 'end_character': 559, 'bleu_score': 0.777079328029983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5435866931303142043}, 'section': 'Section::::History.\n'}]}]