<http://webisa.webdatacommons.org/prov/54690154>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/286306401> .
<http://webisa.webdatacommons.org/286306401>	<http://www.w3.org/ns/prov#value>	"Returns true if c is a letter and false otherwise." .
<http://webisa.webdatacommons.org/286306401>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<zeepedia.com> .
<http://webisa.webdatacommons.org/286306401>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .