( ( ( The ( gravity acceleration ) ) ( -LRB- ( ( Earth attraction ) -RRB- ) ) ) ( ( ( ( is ( a ( THRUST phenomenon ) ) ) and ) ( NOT ( AN ( ATTRACTION phenomenon ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN gravity) (NN acceleration)) (PRN (-LRB- -LRB-) (NP (NNP Earth) (NN attraction)) (-RRB- -RRB-))) (VP (VP (VBZ is) (NP (DT a) (JJ THRUST) (NN phenomenon))) (CC and) (VP (VBP NOT) (NP (DT AN) (NNP ATTRACTION) (NN phenomenon)))) (. .)))
The gravity acceleration (Earth attraction) is a THRUST phenomenon and NOT AN ATTRACTION phenomenon.
(ROOT (S (NP (NNP Gravity)) (VP (VBZ attracts) (NP (DT the) (NN earth)) (PP (TO to) (NP (DT the) (NN sun)))) (. .)))