<http://webisa.webdatacommons.org/441480951>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<qiniudn.com> .
<http://webisa.webdatacommons.org/441480951>	<http://www.w3.org/ns/prov#value>	"A singleton is an object which can only be instantiated once in a" .
<http://webisa.webdatacommons.org/441480951>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/133180897>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/441480951> .