<http://webisa.webdatacommons.org/152903446>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/152903446>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<saylor.org> .
<http://webisa.webdatacommons.org/prov/516250448>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/152903446> .
<http://webisa.webdatacommons.org/prov/472771350>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/152903446> .
<http://webisa.webdatacommons.org/prov/516246970>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/152903446> .
<http://webisa.webdatacommons.org/152903446>	<http://www.w3.org/ns/prov#value>	"An example for the predicate calculus is P(X,Y), where P is a relation and X and Y are variables that take on values in a domain of discourse." .