SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/doctoralStudent> <http://dbpedia.org/resource/Charles_Drummond_Ellis> }
Under whom did Charles Drummond Ellis do his PhD?
SELECT DISTINCT ?k WHERE { ?k property:doctoral_student resource:Charles_Drummond_Ellis }
James Chadwick
The scientist with Charles Drummond Ellis as a doctoral student is [James Chadwick].
The scientist accompanying Charles Drummond Ellis as a doctoral student is [James Chuck].
[James Chadwick] is the scientist whose doctoral student is him.
[James Chuck] is his doctoral student.
[James Chadwick] is the scientist whose doctoral student is the person.
[James Chuck] is under whom Charles Drummond Ellis do his PhD.