Assertion: graph | /r/HasProperty | pair
Facets:
Source sentences:
text: A graph (sometimes called undirected graph for distinguishing from a directed graph, or simple graph for distinguishing from a multigraph) is a pair G = (V, E), where V is a set whose elements are called vertices (singular: vertex), and E is a set of two-sets (sets with two distinct elements) of vertices, whose elements are called edges (sometimes links or lines).
text: A graph, in general, consists of several vertices, some pairs connected by edges.