About: http://webisa.webdatacommons.org/171726775

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	The simplest example of this is in the first integral homology of closed surfaces; the group has torsion if and only if the surface is non-orientable, such as the Klein bottle.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com