About: http://webisa.webdatacommons.org/118932100

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	They do not get dangerous, per se, but they do begin to lose effectiveness with time, especially when exposed to the elements that can cause degradation, such as heat, light and moisture.
http://www.w3.org/ns/prov#wasQuotedFrom	medschat.com