What is the relationship between Singtel and Singapore in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

[Foreign Language] It is currently preparing to enter the Southeast Asia market as well through a game platform joint venture with Singtel and AIS, number one telecos in Singapore and Thailand, respectively.

Answer: headquarters_location