( ( The ( intrinsic muscles ) ) ( ( allow ( ( some people ) ( to ( ( form ( their tongues ) ) ( into ( specific shapes ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ intrinsic) (NNS muscles)) (VP (VBP allow) (S (NP (DT some) (NNS people)) (VP (TO to) (VP (VB form) (NP (PRP$ their) (NNS tongues)) (PP (IN into) (NP (JJ specific) (NNS shapes))))))) (. .)))
The intrinsic muscles allow some people to form their tongues into specific shapes.
(ROOT (S (NP (JJ Intrinsic) (NNS muscles)) (VP (VBP allow) (NP (PRP$ your) (NNS fingers)) (S (VP (TO to) (VP (ADVP (RB also)) (VB make) (NP (NP (JJ precise) (NNS movements)) (PP (IN for) (NP (NNS actions)))))))) (. .)))