About: http://webisa.webdatacommons.org/80301186

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	by early years specialists and psychologists such as Keller, Orton, Gillingham, Stillman and Montessori way back in the 1920s.
http://www.w3.org/ns/prov#wasQuotedFrom	silkysteps.com