query: #Filtering query to select articles from the focus list not on the ScienceSource wiki
  
  PREFIX ss: <http://sciencesource.wmflabs.org/entity/>
  PREFIX sst: <http://sciencesource.wmflabs.org/prop/direct/>
    
  SELECT DISTINCT ?item ?itemLabel
    WHERE 
          {
            
            ?item wdt:P5008 wd:Q55439927 ;
                  wdt:P921 ?mainsubject .
            ?mainsubject wdt:P1995 wd:Q788926 .
            
         MINUS { SERVICE <http://sciencesource-query.wmflabs.org/proxy/wdqs/bigdata/namespace/wdq/sparql>
         { ?articleitem sst:P3 ss:Q4;
              sst:P2 ?stritem. }
  
            BIND(substr(str(?item),32,39) AS ?stritem) .}
          SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
          }