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'.

Context: Civil War Unknowns Monument Link Information: The Civil War Unknowns Monument, which was located south-southwest of Arlington House, was covered by a canopy. Question: In what year was the Civil War Unknowns Monument built?
Answer: 1865 

Context: In 1873, the Hoylake and Birkenhead Railway was authorised to construct two extensions to its lines Link Information: The Wirral Railway was a railway network in the northern part of the Wirral Peninsula, England. It was incorporated in 1863 Question: In what year was the railway company that was authorized to build two extensions in 1873 founded?
Answer: 1863 

Context: After three singles, The White Stripes released their self-titled debut album in June 1999. Link Information: none Question: What three singles did The White Stripes release before their first album?

Answer: none