TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : Saint Ambrose barring Theodosius from Milan Cathedral is a 1619--1620 painting by Anthony van Dyck, now in the National Gallery in London.
Question : What is the name of the place where Saint Ambrose barring Theodosius from Milan Cathedral can be found?

SOLUTION: National Gallery

PROBLEM: Context : Rear Admiral Benjamin F. Sands (February 11, 1811 -- June 30, 1883) was an officer in the United States Navy during the Mexican--
Question : What branch was Benjamin F. Sands part of?

SOLUTION: United States Navy

PROBLEM: Context : Mary Villiers, Countess of Buckingham (nee Beaumont; c. 1570 -- 19 April 1632) is perhaps best known as the mother of the royal favourite Sir George Villiers, 1st Duke of Buckingham.
Question : What is Mary Villiers, Countess of Buckingham's spouse's name?

SOLUTION:
George Villiers