Question: when was the first electric rice cooker invented
[{'answer': '1945', 'provenance': [{'wikipedia_id': '375313', 'title': 'Rice cooker', 'start_paragraph_id': 52, 'start_character': 3, 'end_paragraph_id': 52, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '375313', 'title': 'Rice cooker', 'start_paragraph_id': 52, 'start_character': 0, 'end_paragraph_id': 52, 'end_character': 284, 'bleu_score': 0.955027111100031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18012624048318847950}, 'section': 'Section::::History.\n'}]}]