things cannot be RNA and protein at the same type

[egonw]

SELECT (COUNT(DISTINCT ?entity) AS ?count)
      WHERE {
        ?entity a wp:Rna .
        ?entity a wp:Protein . 
        ?entity dcterms:isPartOf ?pathway .
        ?pathway    a wp:Pathway ;
            wp:ontologyTag <http://vocabularies.wikipathways.org/wp#Curation:AnalysisCollection> ;
            wp:organismName        "Homo sapiens"^^xsd:string .     
      }