<http://webisa.webdatacommons.org/prov/15202649>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/220947107> .
<http://webisa.webdatacommons.org/220947107>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/220947107>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<gnu.org> .
<http://webisa.webdatacommons.org/220947107>	<http://www.w3.org/ns/prov#value>	"a character, and it returns 1 if the character is a digit, and 0" .