Question: what is the speed of the nascar pace car
[{'answer': 'pit road speed', 'provenance': [{'wikipedia_id': '1346752', 'title': 'Safety car', 'start_paragraph_id': 36, 'start_character': 113, 'end_paragraph_id': 36, 'end_character': 127, 'bleu_score': 1.0, 'section': 'Section::::NASCAR.\n'}]}, {'provenance': [{'wikipedia_id': '1346752', 'title': 'Safety car', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 322134914495505071}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1346752', 'title': 'Safety car', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 382, 'bleu_score': 0.9694566079002921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 322134914495505071}, 'section': 'Section::::NASCAR.\n'}]}, {'provenance': [{'wikipedia_id': '1346752', 'title': 'Safety car', 'section': 'Section::::NASCAR.\n', 'start_paragraph_id': 36, 'end_paragraph_id': 36, 'meta': {'evidence_span': ['This allows each driver to note the RPM at which pit road speed is maintained. Drivers exceeding that speed on pit road will be penalized, typically a "drive-through" or "stop and go" penalty, costing them valuable track position.', 'pit road speed', 'Since NASCAR does not allow speedometers or electronic speed limiting devices, the pace car circles the track at pit road speed during the warm-up laps.']}}]}]