About: http://webisa.webdatacommons.org/297383667

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	Chemical, instrumental, metallographic, and other techniques may be required.Visual examinationUse hand as well as eye.
http://www.w3.org/ns/prov#wasQuotedFrom	fda.gov