Utilize the input text as a context reference, choose the right relationship between Singtel and Singapore from the options. Options: 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