( Collagen ( ( ( ( is ( ( ( ( a protein ) , ) ( ( an ( important part ) ) ( of ( connective tissue ) ) ) ) , ) ) and ) ( is ( ( the ( ( most common ) protein ) ) ( in ( the body ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Collagen)) (VP (VP (VBZ is) (NP (NP (DT a) (NN protein)) (, ,) (NP (NP (DT an) (JJ important) (NN part)) (PP (IN of) (NP (JJ connective) (NN tissue)))) (, ,))) (CC and) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN protein)) (PP (IN in) (NP (DT the) (NN body)))))) (. .)))
Collagen is a protein, an important part of connective tissue, and is the most common protein in the body.
(ROOT (S (NP (NNP Protein)) (VP (VBZ is) (NP (NP (DT an) (JJ important) (NN part)) (PP (IN of) (NP (DT a) (JJ healthy) (NN diet)))) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN needed) (S (VP (TO to) (VP (VB repair) (NP (NN tissue)))))))))) (. .)))