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Since the 1980 s , they have also been successfully introduced to game ranches in North America for the purpose of hunting ; however , on game ranches , purebreds are rare , as mouflon interbreed with domestic sheep and bighorn sheep .
 location: North America; animal: bighorn sheep
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 location: North America; animal: bighorn sheep