Utilize the input text as a context reference, choose the right relationship between Gunvor and Gennady Timchenko 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.

The yield on the notes climbed to more than 10 percent on March 21, 2014, the day after Gunvor co-founder Gennady Timchenko was sanctioned by the U.S. for his ties to Vladimir Putin.

Answer: founded_by