( ( To freeze ) ( , ( it ( ( must ( be ( ( supplied ( with freshwater ) ) ( from ( great rivers ) ) ) ) ) . ) ) ) )
(ROOT (S (S (VP (TO To) (VP (VB freeze)))) (, ,) (NP (PRP it)) (VP (MD must) (VP (VB be) (VP (VBN supplied) (PP (IN with) (NP (NN freshwater))) (PP (IN from) (NP (JJ great) (NNS rivers)))))) (. .)))
To freeze, it must be supplied with freshwater from great rivers.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (DT the) (NN earth) (POS 's)) (NN freshwater)))) (VP (VBZ is) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (ADJP (JJ frozen)))))) (. .)))