About: http://webisa.webdatacommons.org/333259618

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	He said the specialized programs are, however, able to alter certain important characteristics of a person's voice, such as pitch, duration, and vibrato, or the modulation in frequency produced by professional singers.
http://www.w3.org/ns/prov#wasQuotedFrom	sciencedaily.com