( ( ( Centripetal force ) ( -LRB- ( 1659 -RRB- ) ) ) . )
(ROOT (NP (NP (JJ Centripetal) (NN force)) (PRN (-LRB- -LRB-) (NP (CD 1659)) (-RRB- -RRB-)) (. .)))
Centripetal force (1659).
(ROOT (S (NP (JJ Centripetal) (NN force)) (VP (VBZ is) (NP (NP (DT the) (NN force)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (NP (JJ centripetal) (NN acceleration))))))) (. .)))