( ( For example ) ( , ( one ( ( can ( obtain ( ( a ( PDB file ) ) ( for ( ( water -LRB- ) water ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (NP (PRP one)) (VP (MD can) (VP (VB obtain) (S (NP (DT a) (NNP PDB) (NN file)) (VP (ADVP (IN for)) (VB water) (-LRB- -LRB-) (NP (NN water)))))) (. .)))
For example, one can obtain a PDB file for water ( water.
(ROOT (S (NP (NP (CD One) (NN example)) (PP (IN of) (NP (NN matter)))) (VP (VBZ is) (NP (NN water))) (. .)))
One example of matter is water.