Assertion: subtitle | /r/AtLocation | two forms
Facets:
Source sentences:
text: Subtitles exist in two forms; open subtitles are 'open to all' and cannot be turned off by the viewer; closed subtitles are designed for a certain group of viewers, and can usually be turned on/off or selected by the viewer – examples being teletext pages, US Closed captions (608/708), DVB Bitmap subtitles, DVD/Blu-ray subtitles.