About: http://webisa.webdatacommons.org/210845169

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	Compositional comparisons may be made by methods such as calculating the ratios of the integrated peak intensities of a spectrum to that of a reference peak and comparing the values to those of the comparison sample.
http://www.w3.org/ns/prov#wasQuotedFrom	fbi.gov