Generate a correct and concise answer for the question based on the words in the context.

Ex Input:
Context : The Mark 10 torpedo was a torpedo put into use by the United States in 1915.
Question : In what year did Mark 10 torpedo enter service?

Ex Output:
1915

Ex Input:
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?

Ex Output:
Phoenix

Ex Input:
Context : ISO 3166-2:ST is the entry for Sao Tome and Principe in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Question : Who set the standards for ISO 3166-2:ST?

Ex Output:
International Organization for Standardization