About: http://webisa.webdatacommons.org/280033611

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	K. A. Perko, A weak -bridged knot with at most three bridges is prime, Notices Amer.
http://www.w3.org/ns/prov#wasQuotedFrom	ams.org