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Sir Martin Sorrell of WPP calls Google a "frenemy" because his industry depends on the search engine giant but also fears it wants create technology to cut out it's profitible place as middleman. The angst was palpable at the Cannes Lions advertising festival, which ended Saturday. For example, there's former CEO of ad agency BBH Cindy Gallop, who told a New York Times reporter that Google "wants to replace the advertising industry in its totality." For its part, Google sent its director of European sales, Henrique de Castro, to soothe the industry. “The best results are when we work together with agencies,” de Castro said through surprisingly large, sharp teeth. “The overall trend is that we work better and better with them.”