( ( ( Another ( distinguishing feature ) ) ( of ( plant cells ) ) ) ( ( is ( ( ( ( ( ( ( ( the ( large ( central vacuole ) ) ) , ) ( which ( stores ( ( ( a ( water reserve ) ) ( as ( well as ) ) ) ( essential chemicals ) ) ) ) ) , ) ( ( waste products ) ( of ( cellular metabolism ) ) ) ) , ) and ) ( ( ( ( sometimes other ) ( species-specific functions ) ) , ) ( such ( as ( storage ( of ( poisons ( or ( flower pigments ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT Another) (JJ distinguishing) (NN feature)) (PP (IN of) (NP (NN plant) (NNS cells)))) (VP (VBZ is) (NP (NP (NP (DT the) (JJ large) (JJ central) (NN vacuole)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ stores) (NP (NP (DT a) (NN water) (NN reserve)) (CONJP (RB as) (RB well) (IN as)) (NP (JJ essential) (NNS chemicals))))))) (, ,) (NP (NP (NN waste) (NNS products)) (PP (IN of) (NP (JJ cellular) (NN metabolism)))) (, ,) (CC and) (NP (NP (ADJP (RB sometimes) (JJ other)) (JJ species-specific) (NNS functions)) (, ,) (PP (JJ such) (IN as) (NP (NP (NN storage)) (PP (IN of) (NP (NNS poisons) (CC or) (NN flower) (NNS pigments)))))))) (. .)))
Another distinguishing feature of plant cells is the large central vacuole, which stores a water reserve as well as essential chemicals, waste products of cellular metabolism, and sometimes other species-specific functions, such as storage of poisons or flower pigments.
(ROOT (NP (DT The) (JJ large) (JJ central) (NN vacuole) (NN store) (NN water) (. .)))