<http://webisa.webdatacommons.org/prov/222062882>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/115621573> .
<http://webisa.webdatacommons.org/115621573>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<muslimheritage.com> .
<http://webisa.webdatacommons.org/115621573>	<http://www.w3.org/ns/prov#value>	"It is quite typical of many mathematical theorems that they go in one direction and not the other, and Euclid's theorem on perfect numbers is an example of that." .
<http://webisa.webdatacommons.org/115621573>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .