Premodifier: storm
Head noun: drain

Same concepts
http://dbpedia.org/resource/Storm_drain

Narrower concepts

labelprovenanceconfidence
storm drainisap:3753753370.544047
oilisap:4704989790.400699
waterisap:3763727460.390310
pesticideisap:151649710.371911
leafisap:872673930.268892