<http://webisa.webdatacommons.org/257212734>	<http://www.w3.org/ns/prov#value>	"On the other hand there is a need to verify that queries are being optimized correctly." .
<http://webisa.webdatacommons.org/prov/177642193>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/257212734> .
<http://webisa.webdatacommons.org/257212734>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/257212734>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<blogspot.com> .