machine_question: what all did ben franklin invent and invented by Prokop DiviÅ¡
question: What device was independently invented both by Ben Franklin and Prokop DiviÅ¡?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.019fz)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.019fz ns:law.inventor.inventions ?x .
  ?x ns:law.invention.inventor ns:m.014cm_ . 
  }
webqsp_question: what all did ben franklin invent