( ( ( The Fields ) ( on Earth ) ) ( ( are ( situated ( in ( ocean water ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Fields)) (PP (IN on) (NP (NNP Earth)))) (VP (VBP are) (VP (VBN situated) (PP (IN in) (NP (NN ocean) (NN water))))) (. .)))
The Fields on Earth are situated in ocean water.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (NN earth) (POS 's)) (NN water)))) (VP (VBZ is) (VP (VBN located) (PP (IN in) (NP (NNS oceans)))))))