Context: As of 2013, the global advertising agencies of Omnicom Group and Interpublic Group, both based in Manhattan, had combined annual revenues of approximately US$21 billion, reflecting New York City's role as the top global center for the advertising industry, which is metonymously referred to as "Madison Avenue". The city's fashion industry provides approximately 180,000 employees with $11 billion in annual wages.

Question: What is the popular name of New York's advertising industry?
Answer: Madison Avenue

Question: About how many people work in the New York fashion industry?
Answer: 180,000

Question: About how much does it cost per year to pay workers in the New York fashion industry?
Answer: $11 billion

Question: With Interpublic Group, what company has a combined annual revenue of roughly US$21 billion?
Answer: Omnicom Group

Question: NYC's fashion industry employs how many people?
Answer: 180,000

Question: The Two highest advertising agencies in the world located in NYC are called what?
Answer: Omnicom Group and Interpublic Group