<http://webisa.webdatacommons.org/218105124>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/218105124>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<u-bordeaux.fr> .
<http://webisa.webdatacommons.org/prov/53959428>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/218105124> .
<http://webisa.webdatacommons.org/prov/54798215>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/218105124> .
<http://webisa.webdatacommons.org/218105124>	<http://www.w3.org/ns/prov#value>	" * b is a matrix or column vector, NULL meaning: take the identity matrix" .