Question: who has been the stig on top gear
[{'answer': 'Perry McCarthy', 'provenance': [{'wikipedia_id': '1223646', 'title': 'The Stig', 'start_paragraph_id': 2, 'start_character': 43, 'end_paragraph_id': 2, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ben Collins', 'provenance': [{'wikipedia_id': '1223646', 'title': 'The Stig', 'start_paragraph_id': 3, 'start_character': 168, 'end_paragraph_id': 3, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]