Question: standard unit of distance in the metric system
[{'answer': 'metre', 'provenance': [{'wikipedia_id': '44142', 'title': 'Metric system', 'start_paragraph_id': 2, 'start_character': 66, 'end_paragraph_id': 2, 'end_character': 71, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44142', 'title': 'Metric system', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 428, 'bleu_score': 0.8354196702986211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3617292030365316552}, 'section': 'Section::::Abstract.'}]}]