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: y headed by the Saltigue (the Serer priestly class) Link Information: none Answer: none
Example Output: How many leaders run the priestly class?

Example Input: Context: Later, however, the Great Depression and 20th-century changes in economy and technology sent the borough into decline. Link Information:  it started in 1929 and lasted until the late 1930s Answer: 1929 
Example Output:
When did the event that help cause Columbia, PA to go into decline begin?