About: http://webisa.webdatacommons.org/438394135

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	In order to facilitate such a selection I employ a mask or indicating means such as shown at 21 in Fig. 5, in which appear only those openings or indications 22 which correspond to the intervals of the major scale.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com