<http://webisa.webdatacommons.org/prov/419813091>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/438246735> .
<http://webisa.webdatacommons.org/438246735>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/438246735>	<http://www.w3.org/ns/prov#value>	"In PHP, how do I take a string with all kinds of characters and turn it into a string with just A-Z and 0-9 characters? [duplicate]" .
<http://webisa.webdatacommons.org/438246735>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<stackoverflow.com> .