About: http://webisa.webdatacommons.org/300345774

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	One possible answer: They are simply unable, due to various reasons such as compatibility, lack of resource, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	ruby-lang.org