Who is the doctoral student of Niko Tinbergen that has an EThOS thesis ID of uk.bl.ethos.710826?
SELECT ?obj WHERE { wd:Q153890 p:P185 ?s . ?s ps:P185 ?obj . ?s pq:P4536 ?x filter(contains(?x,'uk.bl.ethos.710826')) }
niko tinbergen: Q153890