Question: Who is thefor J's PhD student Oppenheimer Robert?
Paraphrase: Who is thefor J's PhD understudy Oppenheimer Robert?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q132537 wdt:P185 ?obj . ?obj wdt:P31 wd:Q5 } 
Answer: Hartland Snyder, Willis Lamb, David Bohm, Arnold Nordsieck, Harold Lewis, Samuel W. Alderson, George Volkoff, Robert Serber, Philip Morrison, Melba Phillips, Robert F. Christy, Sidney Dancoff, Stan Frankel, Siegfried Adolf Wouthuysen, Bernard Peters, Harvey Hall, Joseph Weinberg, Leslie Lawrance Foldy