TASK DEFINITION: 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.
PROBLEM: Context: Warrington spent most of his career on the Texas frontier and served under Colonel Ranald S. Mackenzie during the Texas-Indian Wars of the 1870s. Link Information: On February 25, 1871, he assumed command of the 4th U.S. Cavalry at Fort Richardson in Jacksboro, Texas. Answer: the 4th U.S. Cavalry

SOLUTION: What units did the Colonel Warrington served under inn the Texas-Indian Wars command?

PROBLEM: Context: On December 10, 1817, Mississippi became the 20th state admitted to the Union Link Information: none Answer: none

SOLUTION: What state was admitted to the Union just before Mississippi?

PROBLEM: Context: Played for Peru at three Women's Chess Olympiads (2002—2006) Link Information: none Answer: none

SOLUTION:
Who was the host for the 2002 Women's Chess Olympiads where Zapata competed?