<http://webisa.webdatacommons.org/162040028>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/50863590>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/162040028> .
<http://webisa.webdatacommons.org/162040028>	<http://www.w3.org/ns/prov#value>	"subtracting fractions you will find two types of problems:" .
<http://webisa.webdatacommons.org/162040028>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<vu.edu.au> .