Question: what kind of dog is nana in snow dogs
[{'answer': 'a Border Collie', 'provenance': [{'wikipedia_id': '2093928', 'title': 'Snow Dogs', 'start_paragraph_id': 4, 'start_character': 149, 'end_paragraph_id': 4, 'end_character': 164, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'answer': 'Border Collie', 'provenance': [{'wikipedia_id': '2093928', 'title': 'Snow Dogs', 'start_paragraph_id': 4, 'start_character': 151, 'end_paragraph_id': 4, 'end_character': 164, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '2093928', 'title': 'Snow Dogs', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 551, 'bleu_score': 0.7982222279437431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1406902882396017735}, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '2093928', 'title': 'Snow Dogs', 'section': 'Section::::Plot.\n', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['Ted travels to Tolketna to claim his inheritance from Lucy: seven Siberian Huskies named Diesel, Mack, Sniff, Yodel, Scooper, Duchess and Demon, and a Border Collie named Nana. In Tolketna, he discovers his roots. Totally out of his element, Ted is confounded by blizzards, thin ice, foxes, skunks, grizzly bears, an intimidating, crusty old mountain man named James "Thunder Jack" Johnson, and the aggressive, defiant lead dog, Demon.', 'Ted travels to Tolketna to claim his inheritance from Lucy: seven Siberian Huskies named Diesel, Mack, Sniff, Yodel, Scooper, Duchess and Demon, and a Border Collie named Nana.', 'a Border Collie named Nana.']}}]}]