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.

Example Input: Context: He commanded the U.S. forces in the Battle of Tirad Pass, 2 December 1899, where General Gregorio del Pilar was killed Link Information: He was promoted to brigadier-general after this event. Answer: 1 
Example Output: How long had Gregorio del Pilar been a General for when he was killed?

Example Input: Context: Cheap calico prints, imported by the East India Company from Hindustān (India), had become popular. Link Information: 

The company received a Royal Charter from Queen Elizabeth I on 31 December 1600 Answer: 31 December 1600
Example Output: What year was the company that imported calico prints to England founded?

Example Input: Context: The United States Air Force (USAF) had been garrisoning the base with two fighter squadrons until the Sino-American Mutual Defense Treaty came into force on March 3, 1955. Link Information: The United States Air Force (USAF) is the aerial and space warfare service branch of the United States Armed Forces. Answer: the United States
Example Output:
Which country's air force was garrisoned at Taichung until 1955?