Context: The Bell family home was in Cambridge, Massachusetts, until 1880 when Bell's father-in-law bought a house in Washington, D.C., and later in 1882 bought a home in the same city for Bell's family, so that they could be with him while he attended to the numerous court cases involving patent disputes.

Question: In what year did Mabel's father move to Washington D.C.?
Answer: 1880

Question: In what year did Bell acquire a house in D.C.?
Answer: 1882

Question: Where did Bell and Mabel live before 1880?
Answer: Cambridge, Massachusetts

Question: What did Bell have to go to court for in D.C.?
Answer: patent disputes