TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : Sporting Cristal plays home games at the Estadio Alberto Gallardo, but they also play at the Estadio Nacional. 
Question : What was the name of Sporting Cristal's home stadium?

SOLUTION: Estadio Alberto Gallardo

PROBLEM: Context : WASP-18 is a magnitude 9 star located in the Phoenix constellation of the southern hemisphere. 
Question : What constellation is WASP-18 part of?

SOLUTION: Phoenix

PROBLEM: Context : The 8×22mm Nambu is a rimless, bottleneck handgun cartridge introduced in Japan in 1904. 
Question : In which year was the service entry date for 8×22mm Nambu?

SOLUTION:
1904