<http://webisa.webdatacommons.org/424781025>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/424781025>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/prov/54798215>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/424781025> .
<http://webisa.webdatacommons.org/424781025>	<http://www.w3.org/ns/prov#value>	" (3) either of A or B is a zero matrix" .