( ( ( ( ( ( Macro-organic matter ) ( in ( constructed marshes ) ) ) , ) ( ( ( especially young ) ( -LRB- ( < ( ( 10 year-old ) -RRB- ) ) ) ) ones ) ) , ) ( ( contains ( ( ( mostly labile ) ( organic compounds ) ) ( like ( ( ( ( carbohydrates and ) ( water ( soluble compounds ) ) ) and ) ( ( ( relatively little ) lignin ) ( -LRB- ( ( 15-20 percent ) -RRB- ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (JJ Macro-organic) (NN matter)) (PP (IN in) (NP (JJ constructed) (NNS marshes)))) (, ,) (NP (ADJP (ADJP (RB especially) (JJ young)) (PRN (-LRB- -LRB-) (ADVP (RB <)) (ADJP (NP (CD 10)) (JJ year-old)) (-RRB- -RRB-))) (NNS ones)) (, ,)) (VP (VBZ contains) (NP (NP (ADJP (RB mostly) (JJ labile)) (JJ organic) (NNS compounds)) (PP (IN like) (NP (NP (NP (NNS carbohydrates)) (CC and) (NP (NN water) (JJ soluble) (NNS compounds))) (CC and) (NP (NP (ADJP (RB relatively) (JJ little)) (NN lignin)) (PRN (-LRB- -LRB-) (NP (CD 15-20) (NN percent)) (-RRB- -RRB-))))))) (. .)))
Macro-organic matter in constructed marshes, especially young (&lt;10 year-old) ones, contains mostly labile organic compounds like carbohydrates and water soluble compounds and relatively little lignin (15-20 percent).
(ROOT (S (NP (NNS Carbohydrates)) (VP (VBP are) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN type)) (PP (IN of) (NP (JJ organic) (NN compound))))) (. .)))