About: http://webisa.webdatacommons.org/156413655

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Symmetry, i.e. we wish the distance from A to B to be the same as the distance from B to A. If there is a link from A to B and also one from B to A, we calculate the distance using the higher of the two values.
http://www.w3.org/ns/prov#wasQuotedFrom	cmu.edu