prefix dc: <http://purl.org/dc/terms/>
prefix on: <http://dbpedia.org/ontology/>
Prefix foaf: <http://xmlns.com/foaf/0.1/>
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix skos: <http://www.w3.org/2004/02/skos/core#>
prefix category: <http://dbpedia.org/resource/Category:>
prefix sch:<http://schema.org/>
prefix owl: <http://www.w3.org/2002/07/owl#> 
prefix on_owl: <http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#>

select  ?p ?o (COUNT (?o) AS ?count) where { 
   ?s ?p ?o
   FILTER((?o!= category:American_scientists)
   &&(?o!= on:Agent)
   &&(?o!= on:Person)
   &&(?o!= sch:Person)
   &&(?o!= foaf:Person)
   &&(?o!= owl:Thing)
   &&(?o!= on_owl:Agent)
   &&(?o!= on_owl:NaturalPerson)
   )
}
GROUP BY ?p ?o
ORDER BY DESC(?count)
limit 50




{ select (sum(?s) as ?total) 
   where { ?s ?p ?o } }