What is the relationship between Ruth Porat and Chief Financial Officer in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

The arrival of new Chief Financial Officer Ruth Porat in May has assuaged investor concerns that Google boss Larry Page's spending on projects outside the main search-advertising business -- from driverless cars to computerised spectacles -- would keep accelerating without paying off in higher revenue.

Answer: position_held