About: http://webisa.webdatacommons.org/357420423

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	So, your question seems to boil down to whether or not there is a natural candidate for a non-square in $\mathbb{F}_p$.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net