machine_question: who is the king of where the currency Cambodian franc is used  now
question: Who is the king of the place where the Cambodian franc is used as currency?
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:location.country.currency_formerly_used ns:m.09fstt . 
  ?c ns:government.governmental_jurisdiction.governing_officials ?y .
  ?y ns:government.government_position_held.office_holder ?x .
  ?y ns:government.government_position_held.basic_title ns:m.03w9bnr .
  FILTER(NOT EXISTS {?y ns:government.government_position_held.from ?sk0} || 
  EXISTS {?y ns:government.government_position_held.from ?sk1 . 
  FILTER(xsd:datetime(?sk1) <= "2015-08-10"^^xsd:dateTime) })
  FILTER(NOT EXISTS {?y ns:government.government_position_held.to ?sk2} || 
  EXISTS {?y ns:government.government_position_held.to ?sk3 . 
  FILTER(xsd:datetime(?sk3) >= "2015-08-10"^^xsd:dateTime) })
  }
  
webqsp_question: who is the king of cambodia now