Utilize the input text as a context reference, choose the right relationship between BMW Z4 and BMW 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.
Text: In January this year, Transstroy signed three car loan agreements for Rs 4.73 crore with Alphera Financial Services, a financing arm of BMW Group Financial Services, to buy a Lamborghini Huracan coupe, a Mercedes Benz S350 and a BMW Z4 sDrive.
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