machine_question: what did the person that said "Everything I know I learned after I was thirty." do
question: What occupations were held by the person who stated "Everything I know I learned after I was thirty?"?
sparql: 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:people.person.quotations ns:m.048hl6c . 
  ?c ns:people.person.profession ?x .
  }
  
webqsp_question: what did george clemenceau do