About: http://webisa.webdatacommons.org/195373975

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 VAS is a continuous scale comprised of a 100 mm in length line, anchored by 2 verbal descriptors, one for each symptom extreme 0 (no pain) and 100 (worst pain).
http://www.w3.org/ns/prov#wasQuotedFrom	clinicaltrials.gov