premise: Leslie has only visited Cyprus, Ross has only visited Dominica, Russell has only visited Togo, Jamie has only visited Djibouti, Alberto has only visited Somalia, Derek has only visited Romania, Kurt has only visited South Korea, Alfredo has only visited Afghanistan, Andre has only visited The Bahamas, William has only visited Tanzania, Everett has only visited Haiti, Curtis has only visited South Sudan
hypothesis: Curtis didn't visit South Sudan