what is the longest river in the smallest state in the usa
SELECT river_name FROM river WHERE LENGTH  =  ( SELECT MAX ( LENGTH ) FROM river WHERE traverse IN ( SELECT state_name FROM state WHERE area  =  ( SELECT MIN ( area ) FROM state ) ) ) AND traverse IN ( SELECT state_name FROM state WHERE area  =  ( SELECT MIN ( area ) FROM state ) );
SELECT river_name FROM river WHERE LENGTH  =  ( SELECT MAX ( LENGTH ) FROM river WHERE traverse IN ( SELECT state_name FROM state WHERE area  =  ( SELECT MIN ( area ) FROM state ) ) ) AND traverse IN ( SELECT state_name FROM state WHERE area  =  ( SELECT MIN ( area ) FROM state ) );
[{'Nenhum': 'Nenhum resultado encontrado'}]