sentences:  For example, WJBK in Detroit is the flagship station of the Detroit Lions Television Network, which feeds Detroit Lions pre-season football games to six stations in Michigan.However, the "sports flagship television station" is rapidly becoming a thing of the past, with the growing popularity of cable- and satellite-exclusive regional sports networks such as Fox Sports Networks and NBC Sports Regional Networks, which hold exclusive broadcast rights to several teams in their market for Major League Baseball, the National Hockey League and the National Basketball Association.The National Football League has a different structure, as all games require over-the-air broadcast and the league and teams are generally loathe to use only a local cable broadcaster to distribute preseason and team programming.