( And ( ( whilst ( Pluto ( is ( ( large enough ) ( to ( have ( ( collapsed ( under ( its ( own gravity ) ) ) ) ( into ( a ( spherical shape ) ) ) ) ) ) ) ) ) ) ( , ( ( ( ( ( that ( , ( too ( , ( ( ( is not ) ( a ( sufficient claim ) ) ) ( to ( full planethood ) ) ) ) ) ) ) , ) or ) ( Ceres ( ( would also ) ( be ( a ( major planet ) ) ) ) ) ) . ) ) ) )
(ROOT (S (CC And) (SBAR (IN whilst) (S (NP (NNP Pluto)) (VP (VBZ is) (ADJP (JJ large) (RB enough) (S (VP (TO to) (VP (VB have) (VP (VBN collapsed) (PP (IN under) (NP (PRP$ its) (JJ own) (NN gravity))) (PP (IN into) (NP (DT a) (JJ spherical) (NN shape))))))))))) (, ,) (S (NP (DT that)) (, ,) (ADVP (RB too)) (, ,) (VP (VBZ is) (RB not) (NP (DT a) (JJ sufficient) (NN claim)) (PP (TO to) (NP (JJ full) (NN planethood))))) (, ,) (CC or) (S (NP (NNP Ceres)) (VP (MD would) (ADVP (RB also)) (VP (VB be) (NP (DT a) (JJ major) (NN planet))))) (. .)))
And whilst Pluto is large enough to have collapsed under its own gravity into a spherical shape, that, too, is not a sufficient claim to full planethood, or Ceres would also be a major planet.
(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))))))))) (. .)))