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'.
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Question: Context: The track became the best-selling digital song of all time until it was surpassed by Pharrell Williams' "Happy" in 2014. Link Information: The song was reissued on December 16, 2013, by Back Lot Music under exclusive license to Columbia Records, a division of Sony Music. Question: Which record label released the song that became the best-selling digital song of all time in 2014?

Answer: Answer: Columbia Records

Question: Context: She appeared as Brangane in Wagner's Tristan und Isolde, as Fricka in his Die Walkure, as Ortrud in his Lohengrin, Link Information: t was composed between 1857 and 1859 Question: Which of Wagner's operas that Cavelti starred in was written first?

Answer: Answer: Lohengrin,

Question: Context: The division traced its heritage back to the 7th Guards Tank Corps, formed during World War II in July 1943 from the 15th Tank Corps for its performance in Operation Kutuzov, the Soviet counteroffensive after the Battle of Kursk. Link Information: The Battle of Kursk was a Second World War engagement between German and Soviet forces Question: What countries battled in the Battle of Kursk?

Answer:
Answer: German and Soviet