Assertion: undirected graph | /r/HasAspect | vertex
Facets:
value: for each train
type: TRANSITIVE-OBJECT
value: for each station
type: LOCATION
Source sentences:
text: This problem can be modeled as a dominating set problem in a bipartite graph that has a vertex for each train and each station and an edge for each pair of a station and a train that stops at that station.