query: # Count fishbase taxa in wikidata & whether they have an article in enwiki 
  SELECT ?item ?FishBaseid ?taxon_name ?article ?sitelink WHERE {
   {?item wdt:P225 ?taxon_name. 
   
    ?item wdt:P938 ?FishBaseid.    # FishBase ID 
    OPTIONAL{
    ?article schema:about ?item. # and have an article about them
    ?article schema:isPartOf <https://en.wikipedia.org/> . # on *English* Wikipedia}
    ?sitelink ^schema:name ?article .}
    
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". } 
    }
  
  }
  