( Antarctica ( ( is ( ( the ( driest continent ) ) ( in ( the world ) ) ) ) . ) )
(ROOT (S (NP (NNP Antarctica)) (VP (VBZ is) (NP (NP (DT the) (JJ driest) (NN continent)) (PP (IN in) (NP (DT the) (NN world))))) (. .)))
Antarctica is the driest continent in the world.
(ROOT (S (NP (NNP Antarctica)) (VP (VBZ is) (NP (NP (DT the) (JJ only) (NN continent)) (PP (IN without) (NP (NNS amphibians))))) (. .)))