Assertion: smuggler's tunnel | /r/CapableOf | double as other functional channel
Facets:
value: often
type: TEMPORAL
Source sentences:
text: However, tunnels often double as a storm drain or some other functional channel, or else is an extension of a natural fissure in the rock as at Methleigh and Porthcothan, but tunnels and caches (both wholly excavated and formed by extending natural formations) are more commonplace where covert landings in areas with few sheltered beaches exposed smugglers to the attentions of the Revenue Men.