( ( For ( this reason ) ) ( , ( it ( ( is ( common ( to ( see ( ( ( ( a ( saltwater crocodile ) ) ( ( lying still ) ( with ( its ( mouth gaping ) ) ) ) ) - ) ( a ( cooling ( process ( to ( maintain ( ( body temperature ) ( between ( 30 ( and ( 32 ( degrees Celsius ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (DT this) (NN reason))) (, ,) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ common) (S (VP (TO to) (VP (VB see) (NP (NP (NP (DT a) (NN saltwater) (NN crocodile)) (VP (VBG lying) (ADVP (RB still)) (PP (IN with) (NP (PRP$ its) (NN mouth) (NN gaping))))) (: -) (NP (DT a) (JJ cooling) (NN process) (S (VP (TO to) (VP (VB maintain) (NP (NP (NN body) (NN temperature)) (PP (IN between) (NP (CD 30) (CC and) (CD 32) (NNS degrees) (NNS Celsius)))))))))))))) (. .)))
For this reason, it is common to see a saltwater crocodile lying still with its mouth gaping - a cooling process to maintain body temperature between 30 and 32 degrees Celsius.
(ROOT (S (S (VP (VBG Lying) (PP (IN with) (NP (PRP$ their) (NNS mouths))) (ADVP (RB open)))) (, ,) (NP (DT a) (NN behavior)) (VP (VBD called) (SBAR (S (NP (NNP gaping)) (, ,) (ADVP (RB probably)) (VP (VBZ serves) (NP (NP (DT the) (NN function)) (PP (IN of) (S (VP (VBG cooling) (PRT (RP down)) (PP (IN for) (NP (NNS crocodiles))))))))))) (. .)))