( Saturn ( ( holds ( ( ( ( mostly hydrogen ) ( -LRB- ( ( 97 % ) -RRB- ) ) ) , ) ( helium ( -LRB- ( ( 3 % ) -RRB- ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Saturn)) (VP (VBZ holds) (NP (NP (NP (RB mostly) (NN hydrogen)) (PRN (-LRB- -LRB-) (NP (CD 97) (NN %)) (-RRB- -RRB-))) (, ,) (NP (NP (NNP helium)) (PRN (-LRB- -LRB-) (NP (CD 3) (NN %)) (-RRB- -RRB-))))) (. .)))
Saturn holds mostly hydrogen (97%), helium (3%).
(ROOT (S (NP (NNP Saturn)) (VP (VBZ is) (VP (VBN made) (ADVP (RB mostly)) (PP (IN of) (NP (NN helium) (CC and) (NN hydrogen))))) (. .)))