<http://webisa.webdatacommons.org/364620147>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<mathforum.org> .
<http://webisa.webdatacommons.org/prov/516189422>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/364620147> .
<http://webisa.webdatacommons.org/364620147>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/364620147>	<http://www.w3.org/ns/prov#value>	"For every A there is a B such that for every x ??? A there is y ??? B for which P(x,y???) holds." .