machine_question: where was the roman empire centered and is the city that hosted 1960 Summer Olympics
question: What city hosted the 1960 Olympics and was the central city of the roman empire?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.06cmp)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.06cmp ns:location.country.capital ?x .
  ?x ns:olympics.olympic_host_city.olympics_hosted ns:m.0lbd9 . 
  }
webqsp_question: where was the roman empire centered