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.

[EX Q]: Context: In September Tsar Nicholas II of Russia visited the Emperor Francis Joseph of Austria-Hungary Link Information: Nicholas II or Nikolai II Alexandrovich Romanov ( 1868 – 17 July 1918) Answer: Francis Joseph of Austria-Hungary
[EX A]: Which ruler died first?

[EX Q]: Context: He fought in Operation Barbarossa, the German invasion of the Soviet Union, and claimed his first aerial victory on 8 August 1941. Link Information: none Answer: none
[EX A]: How many days did Operation Barbarossa last?

[EX Q]: Context: Commodus, the last emperor of the Antonine dynasty Link Information: The death of Severus Alexander (the last emperor of the Severan dynasty) in 235 triggered what historians call the crisis of the third century. Answer: Antonine dynasty
[EX A]:
Which dynasty last longer the Antonine or the Severan?