What is the {student of} and the {student} of {Michael_Faraday} ?
Who is the {understudy of} the {understudy} of {Michael_Faraday} ?
Who is the {student of} the {student} of {Michael_Faraday} ?
SELECT ?q ?j WHERE { resource:Michael_Faraday property:student ?j . resource:Michael_Faraday property:student_of ?q }
 SELECT ?ans_1 ?ans_2 WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q8750> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1066> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_1. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q8750> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P802> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_2. } 
SELECT ?ans_1 ?ans_2 WHERE { wd:Q8750 wdt:P1066 ?ans_1 . wd:Q8750 wdt:P802 ?ans_2 }
Humphry Davy Charles Joseph Hullmandel