<http://webisa.webdatacommons.org/199828862>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<mozilla.org> .
<http://webisa.webdatacommons.org/199828862>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/214380084>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/199828862> .
<http://webisa.webdatacommons.org/199828862>	<http://www.w3.org/ns/prov#value>	"For the objects other than Bug, some fields are marked Optional to show that they are not always present." .