3 Noun 0 Verb 0 Adj. 0 Adv.
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ENUnderground RailwayNoun
EN
Secret aid to escaping slaves that was provided by abolitionists in the years before the American Civil War
Underground Railroadsubway
bn:00079005n Named Entity
EN
An urban public transit system using underground or elevated trains
rapid transitmass rapid transitunderground train
bn:00053680n Concept
English:
version 2
EN
An electric railway operating below the surface of the ground (usually in a city)
metrotubeunderground
bn:00054667n Concept
English:
rail
rapid transit
rail transport