Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Input: Consider Input: Context : An order to enter the BTR-60P into Soviet Army service was issued on 13 December 1959. 
Answer : 13 December 1959

Output: What year did BTR-60 come into use?


Input: Consider Input: Context : Eleni Avlonitou attended Indiana University (Bloomington) and received her MSc in Physical Education in 1983 and PhD in ergophysiology in 1988. 
Answer : Indiana University

Output: What is the name of university that educated Eleni Avlonitou?


Input: Consider Input: Context : Rear Admiral Frederick Lois Riefkohl (February 27, 1889--September 1969), a native of Maunabo, Puerto Rico, was an officer in the United States Navy and the first Puerto Rican to graduate from the United States Naval Academy and to be awarded the Navy Cross. 
Answer : United States Navy


Output: With which military branch did Frederick Lois Riefkohl hold a command?