What is the {human} for {student of} of {microbiology}
What is the name of a microbiologist?
Name a scientist working in the microbiology field
SELECT DISTINCT ?n WHERE { ?n property:student_of resource:microbiology . ?n rdf:type ontology:human }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1066> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q7193> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?sbj where { ?sbj wdt:P1066 wd:Q7193 . ?sbj wdt:P31 wd:Q5 } 