In the context of the input sentence, determine the relationship between 'Rubicon Project' and 'LOS ANGELES'.
Options: developer, brand, business division, location of formation

LOS ANGELES & LONDON--(BUSINESSWIRE)-- Launch of Argentina and Hungary Advertising Co-Ops Expands Rubicon Project Leadership Role as The Exclusive Publisher Co-operative Marketplace Serving More Than 290 Premium Publishers Globally
location of formation