About: http://webisa.webdatacommons.org/183686923

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	Now, opium is often replaced by drugs such as morphine and codeine (derivative alkaloids) or man-made substitutes (opioids).
http://www.w3.org/ns/prov#wasQuotedFrom	drugaddictiontreatment.com