( ( ( Australia and ) Antarctica ) ( ( are ( ( the ( only ( two continents ) ) ) ( that ( ( are ( entirely south ) ) ( of ( the equator ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Australia) (CC and) (NNP Antarctica)) (VP (VBP are) (NP (NP (DT the) (JJ only) (CD two) (NNS continents)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADVP (RB entirely) (RB south)) (PP (IN of) (NP (DT the) (NN equator)))))))) (. .)))
Australia and Antarctica are the only two continents that are entirely south of the equator.
(ROOT (S (NP (NNP Antarctica)) (VP (VBZ is) (NP (NP (DT the) (JJ only) (NN continent)) (PP (IN without) (NP (NNS amphibians))))) (. .)))