A knowledge graph querying framework

PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX schema: <https://schema.org/>
SELECT DISTINCT ?person ?name WHERE {
  <https://www.rubensworks.net/#me> foaf:knows ?person.
  <https://pietercolpaert.be/#me> (foaf:knows|schema:colleague) ?person.
  <https://ruben.verborgh.org/profile/#me> foaf:knows ?person.
  ?person foaf:name ?name.
  FILTER(LANG(?name) = "")
}