Utilize the input text as a context reference, choose the right relationship between Katanga Mining and Glencore 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.

However, the industry's chamber of mines, said that production would drop below 1 million tonnes due to Glencore (Xetra: A1JAGV - news ) 's suspension of operations at its Katanga Mining (Toronto: KAT.TO - news ) unit, one of Congo's largest copper mines.

Answer: owned_by