invasivespecies.sparql

SELECT ?taxon ?taxonLabel ?de ?en ?fr ?nl  WHERE {
bind(if(bound(?english), "+", "-") as ?en )
bind(if(bound(?french), "+", "-") as ?fr )
bind(if(bound(?dutch), "+", "-") as ?nl )
bind(if(bound(?german), "+", "-") as ?de )
{SELECT ?taxon ?taxonLabel ?english ?french ?dutch ?german WHERE {
   ?taxon wdt:P5588 wd:Q458 .
   OPTIONAL {?english schema:about ?taxon .
   FILTER (regex(str(?english), "https://en.wikipedia"))}
   OPTIONAL {?dutch schema:about ?taxon .
   FILTER (regex(str(?dutch), "https://nl.wikipedia"))}
   OPTIONAL {?french schema:about ?taxon .
   FILTER (regex(str(?french), "https://fr.wikipedia"))}
   OPTIONAL {?german schema:about ?taxon .
   FILTER (regex(str(?german), "https://de.wikipedia"))}
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}}}