TASK DEFINITION: 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.
PROBLEM: Category: LENIN 
Clue: For his subversive activities, Lenin was banished to this region in 1897

SOLUTION: siberia

PROBLEM: Category: WOMEN WRITERS 
Clue: Mary Chesnut's take on this U.S. war was part of a Ken Burns TV documentary

SOLUTION: the civil war

PROBLEM: Category: FISH 
Clue: (Sarah of the Clue Crew in Seattle)  The fish flying here at Seattle's Pike Place Market include this "regal" shining example

SOLUTION:
king salmon