About: http://webisa.webdatacommons.org/450514474

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	Various engineers or companies added features such as circuits to expand the instrument???s range of tones, or to allow it to be added to conventional pipe organs.
http://www.w3.org/ns/prov#wasQuotedFrom	ieeeghn.org