Utilize the input text as a context reference, choose the right relationship between 'George Osborne' and 'Chancellor of the Exchequer' from the options.
Options: distribution format, owner of, publisher, position held

Britain's Chancellor of the Exchequer George Osborne is on Thursday to open bidding for £11.8 billion ($18 billion, 16.3 billion euros) in contracts to build a high-speed rail link in England.
position held