Utilize the input text as a context reference, choose the right relationship between Philippines and Asian Development Bank 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.

The Philippines is slated to see its first green bond, with backing from the Asian Development Bank (ADB).

Answer: member_of