2. CBS, Inc., owns and operates Television City, a television production facility in Los Angeles that is home to many television series. The name Television City is broadcast each week in connection with each show. CBS sells T-shirts, pins, watches, and so on emblazoned with CBS Television City. CBS registered the name Television City with the U.S. Patent and Trademark Office as a service mark for television production services. David and William Liederman wished to open a restaurant in New York City using the name Television City. Besides food, the restaurant would sell television memorabilia such as T-shirts, sweatshirts, and posters. You represent CBS and you have to recommend to your client whether to sue Liederman for trademark infringement