<http://webisa.webdatacommons.org/prov/135814118>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/169834857> .
<http://webisa.webdatacommons.org/169834857>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/169834857>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<dlang.org> .
<http://webisa.webdatacommons.org/169834857>	<http://www.w3.org/ns/prov#value>	"Returns true if the character is a letter according to the XML standard" .