instruction:
In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
question:
Context: After the war ended the DGOS presented performances by European opera companies such as the Opera-Comique, Hamburg Opera and the Netherlands Opera Link Information: none Answer: none
answer:
Which European opera company presented by DGOS has been in operation for the greatest amount of years?


question:
Context: The club was formed in 1892 following a disagreement between the board of Everton and club president John Houlding, who owned the club's ground, Anfield. The dispute over rent resulted in Everton leaving Anfield for Goodison Park, which left Houlding with an empty stadium. Link Information: Everton played at the Anfield ground from 1884 until 1892. Answer: Anfield
answer:
Which ground did the Liverpool Football Club play at longer, Anfield or Goodison Park?


question:
Context: served with the American armed forces in the Pacific theater from 1943 to 1945. Link Information: World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945. Answer: 4
answer:

How long had World War II been going on for when Organski started serving with the American armed forces?