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: along with the Christian National Union, remnants of the broader Center Civic Alliance, and the Peasants' Agreement, with conditional support from Polish People's Party, Solidarity and other minor parties. Link Information: Lech Wałęsa (1980–1991) Answer: Lech Wałęsa
answer:
Who was the leader of Solidarity in 1991?


question:
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
answer:
In 1955 which had more total service members, the Royal Danish Navy or the Royal Danish Army?


question:
Context: During the Polish-Teutonic War (1519–1521), Königsberg was unsuccessfully besieged by Polish forces led by Grand Crown Hetman Mikołaj Firlej. Link Information: Sigismund I the Old, Grand Duke of Lithuania and King of Poland, Answer: Sigismund I 
answer:

Who was the ruler of the Crown of the Polish Kingdom when Königsberg was besieged by Polish forces?