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: During the Second World War Link Information: the Second World War, was a global war that lasted from 1939 to 1945 Question: How many years did the Second World War last?
[A]: Answer: 6


[Q]: Context: In 1978, he became the leading tenor of the Saratov Academic Opera and Ballet Theatre when he performed: Vladimir Igorevich in Borodin's Prince Igor Link Information: It was first performed in St. Petersburg, Russia, in 1890. Question: How many years after its premier did Polozov play Igorevich in Borodin's opera?
[A]: Answer: 82


[Q]: Context: the Polanie remained in situ along the Vistula Link Information: 

The Vistula (; ; ), the longest and largest river in Poland, is the 9th-longest river in Europe, at 1047 km in length Question: How long is the river along which the Polanie remained in situ?
[A]:
Answer: 1047 km