About: http://webisa.webdatacommons.org/337219910

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	Prior to the present invention, the gradual release of active agents, such as drugs, could be accomplished by the diffusion of the active agent through an encapsulating material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca