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: She appeared as Brangäne in Wagner's Tristan und Isolde, as Fricka in his Die Walküre, 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 Achaemenid Empire (550–330 BC), founded by Cyrus the Great, Link Information: The reign of Cyrus the Great lasted c. 30 years Question: What years did Cyrus the Great rule the Achaemenid Empire?
answer:
Answer: 30


question:
Context: At the Potsdam Conference in July 1945, the Combined Chiefs of Staff decided that Indochina south of latitude 16° north was to be included in the Southeast Asia Command under British Admiral Mountbatten. Link Information: Admiral of the Fleet Louis Francis Albert Victor Nicholas Mountbatten, 1st Earl Mountbatten of Burma (born Prince Louis of Battenberg; 25 June 1900 Question: How old was the British Admiral when he took control of the Southeast Asia Command?
answer:

Answer: 45