a person in the record
Jason Johnston
Doctoral advisors on Wikidata: Errol W. Hewett, Maarten Latm Hertog, and Roger Harker.
Advisors on Wikidata
Wikidata's own statements of who supervised whom, kept apart from the record's theses and never counted with them.
Wikidata run graph-wikidata-20261008T220003Z