Question: What was identified by the advisor of Maurice Goldhaber?
Answer(s):
answer: Neutron

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:education.academic.advisees ns:m.07p5rn . 
?c ns:base.nobelprizes.nobel_prize_winner.nobel_honor ?y .
?y ns:base.nobelprizes.nobel_honor.subject_area ?x .
}