About: http://webisa.webdatacommons.org/245027498

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	Cardan knew that you could not take the square root of a negative number yet he also knew that x = 4 was a solution to the equation.
http://www.w3.org/ns/prov#wasQuotedFrom	st-and.ac.uk