Question: what type of device is a bicycle dynamo
[{'answer': 'magnetos', 'provenance': [{'wikipedia_id': '10631769', 'title': 'Dynamo', 'start_paragraph_id': 6, 'start_character': 166, 'end_paragraph_id': 6, 'end_character': 174, 'bleu_score': 1.0, 'section': 'Section::::Etymology.\n'}]}, {'provenance': [{'wikipedia_id': '10631769', 'title': 'Dynamo', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 174, 'bleu_score': 0.934334813046729, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8764142320032827164}, 'section': 'Section::::Etymology.\n'}]}]