<http://webisa.webdatacommons.org/prov/337078715>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/231328988> .
<http://webisa.webdatacommons.org/231328988>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/231328988>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<netlib.org> .
<http://webisa.webdatacommons.org/231328988>	<http://www.w3.org/ns/prov#value>	" events in-network is a challenge." .