You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who plays bucky in captain america civil war?" whose answer is Sebastian Stan.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who plays bucky in captain america civil war
Useful Output:

Doc 1: Sergeant James Buchanan "Bucky" Barnes is a World War II veteran, former officer of the 107th Infantry Regiment and the best friend of Steve Rogers since
Doc 2: from the upcoming Captain America 3: Civil War DVD - Sebastian Stan is Bucky Barnes - The Winter Soldier.
Doc 3: Though the sequel to Captain America: The Winter Soldier is said to focus heavily on Steve Rogers' relationship with Bucky Barnes, actor Sebastian Stan is
Doc 4: Ahead of his starring turn in Thunderbolts*, Sebastian Stan discussed getting into shape to reprise his role of Bucky Barnes/the Winter
Doc 5: On the set of Captain America: Civil War, stars Chris Evans and Sebastian Stan talk about playing men out of time, Bucky's mental state,