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.
What is the relationship between 'Gunvor' and 'Gennady Timchenko' in the context of the input sentence.
Options: manufacturer, founded by, publisher, business division