Random triples
| Subject | Object |
|---|---|
| gptkb:EIA-608_Closed_Captioning_Standard | line 21 of the vertical blanking interval |
| gptkb:EIA-608D | line 21 of the vertical blanking interval |
| gptkb:EIA-608S | line 21 of the vertical blanking interval |
| gptkb:CEA-608 | line 21 of the vertical blanking interval |
| gptkb:EIA-608_Teletext_Specification | line 21 of the vertical blanking interval |