About: http://webisa.webdatacommons.org/417099083

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	Astronomers have learned much about the universe by observing the different kinds of electromagnetic radiation that exist in nature (see Figure 2.1).
http://www.w3.org/ns/prov#wasQuotedFrom	nap.edu