( ( ( ( ( An exoplanet ) , ) HAT-P-12b ) , ) ( ( was ( discovered ( ( orbiting ( the star ) ) ( by ( ( the ( transit method ) ) ( in 2009 ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT An) (NN exoplanet)) (, ,) (NP (NNS HAT-P-12b)) (, ,)) (VP (VBD was) (VP (VBN discovered) (S (VP (VBG orbiting) (NP (DT the) (NN star)) (PP (IN by) (NP (NP (DT the) (NN transit) (NN method)) (PP (IN in) (NP (CD 2009))))))))) (. .)))
An exoplanet, HAT-P-12b, was discovered orbiting the star by the transit method in 2009.
(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))))))))))) (. .)))