Enderle said Yahoo (Hanover: YHO.HA - news ) 's decision to lure Marissa Mayer from Google to be CEO has failed to deliver the results many had hoped for and that she has become "an example of what not to do."
Take context from the input text and decide on the accurate relationship between 'Marissa Mayer' and 'Yahoo' from the options provided.
Options: currency, employer, stock exchange, location of formation