What is {doctoral student} of {Stephen Hawking} that is {EThOS thesis ID} is {uk.bl.ethos.625075} ?
Who is the doctoral student for Stephen Hawking with the EThOS thesis ID of uk.bl.ethos.625075?
SELECT ?obj WHERE { wd:Q17714 p:P185 ?s . ?s ps:P185 ?obj . ?s pq:P4536 ?x filter(contains(?x,'uk.bl.ethos.625075')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q17714> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P185> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P4536> <uk.bl.ethos.625075>
} 

The EThOS thesis ID of uk.bl.ethos.625075 was written by which of Stephen Hawking's doctoral students?