Refer to the input text as context and select the correct relationship between 'Janet Yellen' and 'economist' from the available options.
Options: industry, location of formation, headquarters location, position held

St George chief economist Hans Kunnen said prices in most major bond markets were little changed after the comments from US Fed chair Janet Yellen "added no fresh insights into monetary policy thinking", and reiterated a US interest rate rise is likely in 2015.
position held