About: http://webisa.webdatacommons.org/401072574

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	The Spanish newspaper El Pais has a series of videos on various math problems, together with solutions (posted later), it is set up as a sort of competition but just watching is (usually) great fun.
http://www.w3.org/ns/prov#wasQuotedFrom	mapleprimes.com