In the context of the input sentence, determine the relationship between 'George Osborne' and 'Chancellor of the Exchequer'.
Options: owner of, distribution format, position held, publisher

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