About: http://webisa.webdatacommons.org/31873825

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	Yes, any file inside /etc/apt/sources.list.d must have a .list extension otherwise apt will print a warning message and ignore the file, except if file matches a pattern in apt's Dir::Ignore-Files-Silently option.
http://www.w3.org/ns/prov#wasQuotedFrom	askubuntu.com