( ( ( ( It ( can ( ( be organic ) ( -LRB- ( ( ( ( ( ( ( compost , ) ( leaf mold ) ) , ) ( bark chips ) ) , ) ( shredded leaves ) ) -RRB- ) ) ) ) ) or ) ( it ( can ( ( be inorganic ) ( -LRB- ( ( ( ( ( gravel , ) rock ) , ) ( decomposing granite ) ) -RRB- ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (MD can) (VP (VB be) (ADJP (JJ organic)) (PRN (-LRB- -LRB-) (NP (NP (NN compost)) (, ,) (NP (NN leaf) (NN mold)) (, ,) (NP (NN bark) (NNS chips)) (, ,) (NP (JJ shredded) (NNS leaves))) (-RRB- -RRB-))))) (CC or) (S (NP (PRP it)) (VP (MD can) (VP (VB be) (ADJP (JJ inorganic)) (PRN (-LRB- -LRB-) (NP (NP (NN gravel)) (, ,) (NP (NN rock)) (, ,) (NP (JJ decomposing) (NN granite))) (-RRB- -RRB-))))) (. .)))
It can be organic (compost, leaf mold, bark chips, shredded leaves) or it can be inorganic (gravel, rock, decomposing granite).
(ROOT (S (NP (DT A) (NN mold)) (VP (VBZ is) (NP (NP (DT an) (NN imprint)) (PP (IN of) (NP (NP (DT an) (NN organism)) (VP (VBN left) (PP (IN in) (NP (NN rock)))))))) (. .)))