About: http://webisa.webdatacommons.org/446717162

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	Computing all the tails of y, then checking every single one of them to see if x is a prefix, then summarising that to see if any of the tests returned true is asymptotically much worse, and usually quite impractical.
http://www.w3.org/ns/prov#wasQuotedFrom	lambda-the-ultimate.org