About: http://webisa.webdatacommons.org/213139218

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	With a few modifications in the right places, it can be used to detect repeated substrings with slight alterations (like your example of a pattern that is repeated with one character exchanged in the middle).
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com