( It ( ( ( is ( with ( that instrument ) ) ) ( that ( ( ( the ( first exoplanet ) ) ( around ( ( an ( ordinary star ) ) ( -LRB- ( ( 51 Peg ) -RRB- ) ) ) ) ) ( was discovered ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (PP (IN with) (NP (DT that) (NN instrument))) (SBAR (IN that) (S (NP (NP (DT the) (JJ first) (NN exoplanet)) (PP (IN around) (NP (NP (DT an) (JJ ordinary) (NN star)) (PRN (-LRB- -LRB-) (NP (CD 51) (NNS Peg)) (-RRB- -RRB-))))) (VP (VBD was) (VP (VBN discovered)))))) (. .)))
It is with that instrument that the first exoplanet around an ordinary star (51 Peg) was discovered.
(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))))))))))) (. .)))