About: http://webisa.webdatacommons.org/274383281

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	From the 1920s to the 1940s, companies such as Parker, Sheaffer, and Waterman produced such flippable nibs (commonly referred to as duo-point nibs).
http://www.w3.org/ns/prov#wasQuotedFrom	richardspens.com