Question: How many different people hold authority over the members of Balanidae family?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/family> <http://dbpedia.org/resource/Balanidae> . ?x <http://dbpedia.org/ontology/binomialAuthority> ?uri  . }
Answer: There are [19] people who hold authority over the members of Balanidae family.