Question: List all the doctoral student of the scientist who has advised John Bowlby?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/doctoralStudents> <http://dbpedia.org/resource/John_Bowlby> . ?x <http://dbpedia.org/property/doctoralStudents> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Scientist>}
Answer: The doctoral students of the scientists whose one doctoral student is John Bowlby are [Abraham Maslow, Mary Ainsworth, John Bowlby].