( They ( ( are ( ( found ( on ( every continent ) ) ) ( except ( for Antarctica ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (VP (VBN found) (PP (IN on) (NP (DT every) (NN continent))) (PP (IN except) (PP (IN for) (NP (NNP Antarctica)))))) (. .)))
They are found on every continent except for Antarctica.
(ROOT (S (NP (NNP Antarctica)) (VP (VBZ is) (NP (NP (DT the) (JJ only) (NN continent)) (PP (IN without) (NP (NNS amphibians))))) (. .)))