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

Context : ISO 3166-2:AD is the entry for Andorra 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:AD?
International Organization for Standardization

Context : The School House is an early American television program broadcast on Tuesday evenings at 9:00 PM Eastern by the DuMont Television Network for a few months in 1949. 
Question : What is the original network of The School House?
DuMont Television Network

Context : The Battle of Hazir and the surrender of Qinnasrin took place in about June, 637. 
Question : The date of Battle of Hazir was what?

June, 637