Question: Which is a rare breed of sled dog, the Thai Bangkaew Dog or the Chinook? 
Sentence (from "Jeff King (mushing)"): A successful sled dog racer, he won the Yukon Quest in 1989, and the Iditarod Trail Sled Dog Race in 1993, 1996, 1998, and most recently, in the 2006 Iditarod.
Relevant evidence: No