Utilize the input text as a context reference, choose the right relationship between Metro and restaurant 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.

German retailer Metro AG has bought Singapore-based restaurant supplier Classic Fine Foods Group from private equity group EQT for $290 million, it said on Thursday as it reported a slowdown in same-store sales due to a shift in Easter.

Answer: industry