query: SELECT *
  WHERE
  {
      SERVICE wikibase:mwapi
      {
        bd:serviceParam wikibase:endpoint "en.wikipedia.org" .
        bd:serviceParam wikibase:limitContinuations "5".
  
        bd:serviceParam wikibase:api "Generator" .
        bd:serviceParam mwapi:generator "allpages" .
        bd:serviceParam mwapi:gaplimit "1" .
  
        # Also add site statistics to the API call:
        bd:serviceParam mwapi:meta "siteinfo" .
        bd:serviceParam mwapi:siprop "interwikimap" .
        ?prefix wikibase:apiOutput "//api/query/interwikimap//@prefix" .
        ?local wikibase:apiOutput "//api/query/interwikimap//@local" .
        ?url wikibase:apiOutput "//api/query/interwikimap//@url" .
      }
      BIND( "y" as ?test) 
  }