Assertion: graph | /r/HasProperty | triangle-free
Facets:
Source sentences:
text: A graph with girth four or more is triangle-free.
text: The problems of testing whether a graph is a median graph, and whether a graph is triangle-free, both had been well studied when Imrich, Klavžar & Mulder (1999) observed that, in some sense, they are computationally equivalent.