Refer to the input text as context and select the correct relationship between 'Rubicon Project' and 'LOS ANGELES' from the available options.
Options: location of formation, developer, business division, brand

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