Utilize the input text as a context reference, choose the right relationship between Riot Games and League of Legends 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.

We will join forces with Riot Games and local government to host diversified online and offline activities to promote world-renowned League of Legends World Championship event, while bringing more e-sports lovers to Bilibili.

Answer: product_or_material_produced