About: http://webisa.webdatacommons.org/144828914

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	Researchers had learned in the 1970s that opiate drugs such as morphine and heroin activated receptor proteins in the brain, and that they mimicked the effects of naturally occurring opioids called endorphins.
http://www.w3.org/ns/prov#wasQuotedFrom	indiana.edu