sentence1_binary_parse: ( ( Their tongues ) ( ( are ( used ( to ( feel things ) ) ) ) . ) )
sentence1_parse: (ROOT (S (NP (PRP$ Their) (NNS tongues)) (VP (VBP are) (VP (VBN used) (S (VP (TO to) (VP (VB feel) (NP (NNS things))))))) (. .)))
sentence1: Their tongues are used to feel things.
sentence2_parse: (ROOT (S (NP (NNS Snakes)) (VP (VBP use) (NP (PRP$ their) (NN tongue)) (PP (TO to) (NP (NN smell) (NNS things)))) (. .)))
sentence2: Snakes use their tongue to smell things.