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.

[Q]: Context: Hillingsø was made a sergeant in the Royal Danish Navy in 1955, but changed to serve in the Royal Danish Army Link Information: none Answer: none
[A]: In 1955 which had more total service members, the Royal Danish Navy or the Royal Danish Army?


[Q]: Context: . Real executive power vests in a Union Council of Ministers Link Information: none Answer: none
[A]: How many members comprise the council in which real executive power is vested?


[Q]: Context: After one year at Munich, he returned to Tübingen to be able to study spectroscopy Link Information: Spectroscopy is the study of the interaction between matter and electromagnetic radiation  Answer: the interaction between matter and electromagnetic radiation
[A]:
What is the focus of the subject Meissner studied on his return to Tübingen?