Question: What mobile ad company founded by Eric Litman was acquired by a British multinational advertising and public relations company?
Sentence (from "Eric Litman"): Litman co-founded Proxicom, built Viaduct from a one-man shop through a merger with the Wolf Group, and was the founder and CEO of Medialets, a mobile ad serving and advertising analytics company acquired by WPP plc.
Relevant evidence: Yes