<http://webisa.webdatacommons.org/prov/369128239>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/431635557> .
<http://webisa.webdatacommons.org/431635557>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/431635557>	<http://www.w3.org/ns/prov#value>	"For example, in the first section, Number Theory, such topics as calculating tricks, divisibility rules with proofs of why they work, and magic squares are investigated fully and clearly." .
<http://webisa.webdatacommons.org/431635557>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<amazon.com> .