<http://webisa.webdatacommons.org/prov/472475260>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/91453105> .
<http://webisa.webdatacommons.org/91453105>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<stackoverflow.com> .
<http://webisa.webdatacommons.org/91453105>	<http://www.w3.org/ns/prov#value>	"Unless I am mistaken, I am aware that in languages such as F# is it not possible to have a null value." .
<http://webisa.webdatacommons.org/91453105>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .