About: http://webisa.webdatacommons.org/435403691

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	If text was a variable, the coding indicated what is known about the difficulty level and nature of the texts being used.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov