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: COLLEGES & UNIVERSITIES 
Clue: This New York univ. is named for the family whose company was the first to sell toothpaste in a tube
colgate university

Category: LITERARY OPERAS 
Clue: Operas based on this author's works include "Il Talismano", "Il Templario" & "La Prigione d'Edimburgo"
sir walter scott

Category: FAMOUS ESTATES 
Clue: After the U.S. government declined to buy this estate & tomb, a ladies association bought it for $200,000 in 1858

mount vernon

