"PREFIX pkm: PREFIX rdfs: PREFIX dwciri: PREFIX openbiodiv: PREFIX prism: PREFIX po: ASK { ?tnu pkm:mentions ?name . ?name rdfs:label ""Messerschmidia incana G. Mey. 1818"" .?tnu dwciri:taxonomicStatus openbiodiv:UnavailableName . ?article po:contains+ ?tnu . ?article prism:publicationDate ?date .     FILTER NOT EXISTS {        ?tnu2 pkm:mentions ?name .       ?tnu2 dwciri:taxonomicStatus openbiodiv:AvailableName .        ?article2 po:contains+ ?tnu2;                prism:publicationDate ?date2 .       FILTER (?date2 > ?date) }   }"