About: http://webisa.webdatacommons.org/176409087

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	For many years scientists wondered why compounds such as morphine, which were derived from plants, should have a biological effect on humans.
http://www.w3.org/ns/prov#wasQuotedFrom	bris.ac.uk