<http://webisa.webdatacommons.org/301302049>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/301302049>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<boost.org> .
<http://webisa.webdatacommons.org/prov/131375989>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/301302049> .
<http://webisa.webdatacommons.org/301302049>	<http://www.w3.org/ns/prov#value>	"True if T is an empty struct or class." .