( Interestingly ( , ( snakes ( ( ( use ( their ( forked tongues ) ) ) ( to smell ) ) . ) ) ) )
(ROOT (S (ADVP (RB Interestingly)) (, ,) (NP (NNS snakes)) (VP (VBP use) (NP (PRP$ their) (JJ forked) (NNS tongues)) (PP (TO to) (NP (NN smell)))) (. .)))
Interestingly, snakes use their forked tongues to smell.
(ROOT (S (NP (NNS Snakes)) (VP (VBP use) (NP (PRP$ their) (NN tongue)) (PP (TO to) (NP (NN smell) (NNS things)))) (. .)))
Snakes use their tongue to smell things.