About: http://webisa.webdatacommons.org/184007387

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	Since G is a tree, there must be a unique path between x1 and x2; let y be a vertex on this path.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov