instruction:
In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
question:
Context: The film begins with a narrated map showing the Confederate Army of Northern Virginia, commanded by Robert E. Lee Link Information: Lee was born at Stratford Hall Plantation in Westmoreland County, Virginia Question: What is the birthplace of the man who commanded the  Confederate Army of Northern Virginia?
answer:
Answer: Westmoreland County, Virginia


question:
Context: where it turns eastward and northeastward, flowing across the northern Great Plains past the city of Billings Link Information: none Question: Who is the current mayor of the city located on the northern Great Plains that the Yellowstone River flow through?
answer:
Answer: none


question:
Context: They bought the Swedish striker Patrik Redo, whom they later had to sell to Keflavík Football Club. Link Information: He stayed only one season before moving to league rivals Keflavik, yet again staying only a year before in 2009 returning to Sweden and Jönköpings Södra IF. Question: How long did Redo play for Keflavik?
answer:

Answer: 1