( ( HD ( 117618 b ) ) ( ( is ( ( an exoplanet ) ( discovered ( ( orbiting ( the star ) ) ( in ( September 2004 ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP HD) (NNP 117618) (NNP b)) (VP (VBZ is) (NP (NP (DT an) (NN exoplanet)) (VP (VBN discovered) (S (VP (VBG orbiting) (NP (DT the) (NN star)) (PP (IN in) (NP (NNP September) (CD 2004)))))))) (. .)))
HD 117618 b is an exoplanet discovered orbiting the star in September 2004.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN exoplanet)) (VP (VBZ is) (ADVP (RB often)) (VP (VBN discovered) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ causes) (NP (DT a) (NN star) (S (VP (VP (TO to) (VP (VB move))) (CC or) (VP (TO to) (VP (VB dim))))))))))) (. .)))