( ( For example ) ( , ( some ( ( suggest ( that ( planets ( ( are bodies ) ( ( large enough ) ( for ( ( ( their ( gravity ( to ( ( pull them ) ( into ( spherical shapes ) ) ) ) ) ) ( but not ) ) ( ( ( large enough ) ( to become ) ) stars ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (NP (DT some)) (VP (VBP suggest) (SBAR (IN that) (S (NP (NNS planets)) (VP (VBP are) (ADVP (RB bodies)) (ADJP (JJ large) (RB enough) (PP (IN for) (NP (NP (PRP$ their) (NN gravity) (S (VP (TO to) (VP (VB pull) (NP (PRP them)) (PP (IN into) (NP (JJ spherical) (NNS shapes))))))) (CONJP (CC but) (RB not)) (NP (ADJP (JJ large) (RB enough) (S (VP (TO to) (VP (VB become))))) (NNS stars))))))))) (. .)))
For example, some suggest that planets are bodies large enough for their gravity to pull them into spherical shapes but not large enough to become stars.
(ROOT (S (NP (NNP High) (NNP gravity)) (VP (VBZ explains) (NP (NP (DT the) (JJ spherical) (NN shape)) (PP (IN of) (NP (NNS ceres)))) (, ,) (SBAR (IN once) (S (VP (VBD thought) (S (VP (TO to) (VP (VB be) (NP (DT the) (JJS largest) (NN asteroid))))))))) (. .)))