About: http://webisa.webdatacommons.org/89963423

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	One example is a fourfold image evenly grouped around a central image (however, the central image is not usually visible) - the cosmic version of a four-leaf clover, called an Einstein cross".
http://www.w3.org/ns/prov#wasQuotedFrom	einstein-online.info