Question: Count the PhD students whose thesis are supervised by National Medal of Science winners?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:prizes <http://dbpedia.org/resource/National_Medal_of_Science> . ?x prop:doctoralStudents ?uri . }