Question: who invented the worlds first bag less vacuum cleaner
[{'answer': 'Sir James Dyson', 'provenance': [{'wikipedia_id': '369661', 'title': 'James Dyson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '369661', 'title': 'James Dyson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 503, 'bleu_score': 0.7926309328308321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9609005492988026832}, 'section': 'Section::::Abstract.'}]}]