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'.

[Q]: 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?
[A]: Answer: 1865 


[Q]: Context: Minaj was one of the opening acts on Britney Spears' 2011 Femme Fatale Tour. Link Information: Opening acts.- Nicki Minaj
- Jessie and the Toy Boys
- Nervo
- DJ Pauly D
- Joe Jonas
- Destinee & Paris
- The Wanted
- Howie Dorough
- Teen Angels Question: Who were the opening acts on Britney Spoears' 201 Femme Fatale Tour?
[A]: Answer: - Nicki Minaj
- Jessie and the Toy Boys
- Nervo
- DJ Pauly D
- Joe Jonas
- Destinee & Paris
- The Wanted
- Howie Dorough
- Teen Angels


[Q]: Context: "Celebrate" was written and produced by R. Kelly and is the last song that Whitney Houston recorded; it is a duet between Houston and R&B/pop singer Jordin Sparks. It was released as the lead single from the soundtrack album  on June 5, 2012. Link Information: Studio albums.- Jordin Sparks (2007)
- Battlefield (2009)
- Right Here Right Now (2015) Question: How many albums had Jordin Sparks released before collaborating with Whitney Houston on "Celebrate"?
[A]:
Answer: 2