Question: which episode of top gear is the polar special
[{'answer': 'Top Gear : Polar Special', 'provenance': [{'wikipedia_id': '13698248', 'title': 'Top Gear: Polar Special', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13698248', 'title': 'Top Gear: Polar Special', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 462, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7619834742208465931}, 'section': 'Section::::Abstract.'}]}]