A triple store is a data store that contains RDF triples. Consider a triple store that contains (millions of) RDF triples that use FOAF profiles. In other words, these RDF triples are written by using terms from one single ontology, the FOAF ontology (http://www.foaf-project.org/). Since these RDF triples are collected from various web sites, the same person is likely identified by using different URIs.

For example, one site creates several RDF triples about Tim Berners-Lee, saying he is the inventor of the web we are using today. Another web site also talks about Tim Berners-Lee, by adding some more information about his contribution to the idea of the Semantic Web. These two web sites are often using different URIs to represent Tim Berners-Lee as a resource.

Our goal is to integrate all the information about Tim Berners-Lee (and of course for all other similar cases). To do so, we need to link seemingly different resources. One way to generate links for FOAF triples is when two resources share the same value for the foaf:mbox property, these two resources must be identical, even the URIs used to identify them are different.

Write a SPARQL construct query to generate owl:sameAs statements based on this property. Make sure your solution only generates triples where the subject and object are different (i.e., non-trivial owl:sameAs statements).