About: http://webisa.webdatacommons.org/398226540

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	Some problems, such as 2-7 and 9/71, have answers on the real number line; others, such as ???-3 and 99xi have answers on the imaginary number line.
http://www.w3.org/ns/prov#wasQuotedFrom	pcadvisor.co.uk