This program is intended to be viewed by mature, adult audiences and may be unsuitable for children under 17.[1] Contains content that is unsuitable for children. This rating was originally TV-M prior to the announced revisions to the rating system in August 1997 but was changed due to a trademark dispute and in order to remove confusion with the Entertainment Software Rating Board's (ESRB) "M for Mature" rating for video games.[12] This rating is very seldom used by broadcast networks or local television stations due to FCC restrictions on program content, although it is commonly applied to television programs featured on certain cable channels (basic and premium networks) and streaming networks for both mainstream and softcore programs. Broadcast programming that has carried a TV-MA warning include first-run episodes of South Park, Turner Classic Movies' airings of certain films made after the MPAA rating system was introduced, the pilot of the CBS police series Brooklyn South and documentaries such as Ken Burns' The Vietnam War on PBS, along with a few 10 p.m.