( ( ( The ( ( most abundant ) elements ) ) ( in ( the Sun ) ) ) ( ( are ( ( hydrogen and ) helium ) ) . ) )
(ROOT (S (NP (NP (DT The) (ADJP (RBS most) (JJ abundant)) (NNS elements)) (PP (IN in) (NP (DT the) (NNP Sun)))) (VP (VBP are) (NP (NP (NN hydrogen)) (CC and) (NP (NNP helium)))) (. .)))
The most abundant elements in the Sun are hydrogen and helium.
(ROOT (S (NP (DT The) (NN sun)) (ADVP (RB mostly)) (VP (VBD made) (PRT (RP up)) (PP (IN of) (NP (DT the) (NN element) (NN hydrogen)))) (. .)))