About: http://webisa.webdatacommons.org/228995644

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	Making an object invisible to light is the biggest challenge, as opposed to shielding something from radio waves or sound waves.
http://www.w3.org/ns/prov#wasQuotedFrom	afcea.org