Utilize the input text as a context reference, choose the right relationship between Sierra Leone and World Health Organization 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 World Health Organization said on Monday that a further $696 million in donor funding is needed to rebuild health services in Guinea, Sierra Leone and Liberia over the next two years.

Answer: member_of