( ( ( The force ) ( of gravity ) ) ( ( ( ( ( causes it ) ( to collapse ) ) , ) ( becoming ( white hot ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN force)) (PP (IN of) (NP (NN gravity)))) (VP (VBZ causes) (NP (PRP it)) (PP (TO to) (NP (NN collapse))) (, ,) (S (VP (VBG becoming) (NP (JJ white) (NNS hot))))) (. .)))
The force of gravity causes it to collapse, becoming white hot.
(ROOT (S (NP (NNP Gravity)) (VP (VBZ causes) (S (NP (NNS rocks)) (VP (TO to) (VP (VB roll) (ADVP (RB downhill)))))) (. .)))