Hutchison Chairman Li Ka-shing and Russian billionaire Mikhail Fridman -- whose LetterOne fund holds 47.9 percent of Vimpelcom's voting rights -- have held on-off talks for years on a deal in Italy and came close a few times before scrapping it at the eleventh hour over control.
In the context of the input sentence, determine the relationship between 'LetterOne' and 'Mikhail Fridman'.
Options: owned by, industry, member of, headquarters location