Given the task definition and input, reply with output. You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: WYOMING 
Clue: The source of this main tributary of the Columbia River is located in Yellowstone National Park

the snake river
Given the task definition and input, reply with output. You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: WYOMING 
Clue: The source of this main tributary of the Columbia River is located in Yellowstone National Park

user
the snake river
assistant
Given the task definition and input, reply with output. You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: WYOMING 
Clue: The source of this main tributary of the Columbia River is located in Yellowstone National Park

the snake river