Premise: Connaught Tunnel . The Connaught Tunnel is a railway tunnel under the Selkirk Mountains in southeastern British Columbia , Canada , near the city of Revelstoke . The tunnel was later lined with reinforced concrete and equipped with a better ventilation system . A tunnel is an underground passageway , dug through the surrounding soil/earth/rock and enclosed except for entrance and exit , commonly at each end .
Hypothesis: Connaught Tunnel is an underground passageway.
Label: ENTAILMENT