<http://webisa.webdatacommons.org/prov/203132729> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/126161023> . <http://webisa.webdatacommons.org/prov/336932757> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/126161023> . <http://webisa.webdatacommons.org/126161023> <http://www.w3.org/ns/prov#wasQuotedFrom> <cuny.edu> . <http://webisa.webdatacommons.org/126161023> <http://www.w3.org/ns/prov#value> "Light is a form of electromagnetic radiation, and all EM radiation is composed of something called an electric field." . <http://webisa.webdatacommons.org/126161023> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .