Random triples
| Subject | Object |
|---|---|
| gptkb:Channel_Tunnel | advanced monitoring systems |
| gptkb:Birkenhead_Tunnel | CCTV surveillance installed |
| gptkb:The_Third_Infiltration_Tunnel | gptkb:High |
| gptkb:Cross-Harbour_Tunnel | CCTV surveillance |
| gptkb:Chunnel | monitored 24/7 |