Utilize the input text as a context reference, choose the right relationship between Xstrata 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.

Klein brokered the talks between the bosses of Glencore Plc and Xstrata Plc that led to the $29 billion all-share takeover of the mining group by the commodity trader in 2013.

Answer: owned_by