"stable" . "1.2.2.0.5.5" . . . "Length of tunnel"@en . "1.2.1.0.5.5" . . . . "true"^^ . "1.1.1.1.8.7" . . "2024-05-16"^^ . "Length of a tunnel in metres from entrance portal to exit portal."@en . "ITU_Length" .