Question: when did the first rainbow vacuum come out
[{'answer': '1955', 'provenance': [{'wikipedia_id': '6281317', 'title': 'Rexair', 'start_paragraph_id': 10, 'start_character': 48, 'end_paragraph_id': 10, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '6281317', 'title': 'Rexair', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 223, 'bleu_score': 0.948006874591591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7693130749094139449}, 'section': 'Section::::History.\n'}]}]