instruction:
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 consistency, answers should be in all lower cased letters.
question:
Category: APPROBATION 
Clue: In 1982 Lenny Skutnick rescued a passenger on a crashed 737 from this D.C. river
answer:
potomac


question:
Category: HOME RUN SLUGGERS 
Clue: When he slugged 61 home runs in 1961, his batting average was only .269
answer:
roger maris


question:
Category: THE 1860s 
Clue: In 1868 this Liberal Party member succeeded Disraeli as British Prime Minister; he served in that capacity 3 other times
answer:

gladstone