About: http://webisa.webdatacommons.org/287187085

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	The tool of claim 38 , wherein the difficulty changing means further comprises means for changing types of the sounds presented to the user, the types of sounds including vowels and consonants. 42.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com