( ( The ( brain stem ) ) ( ( controls ( ( a number ) ( of ( ( unconscious activities ) ( such ( as ( ( ( ( ( ( heart rate ) , ) breathing ) , ) and ) others ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN brain) (NN stem)) (VP (VBZ controls) (NP (NP (DT a) (NN number)) (PP (IN of) (NP (NP (JJ unconscious) (NNS activities)) (PP (JJ such) (IN as) (NP (NP (NN heart) (NN rate)) (, ,) (NP (NN breathing)) (, ,) (CC and) (NP (NNS others)))))))) (. .)))
The brain stem controls a number of unconscious activities such as heart rate, breathing, and others.
(ROOT (S (NP (DT The) (NN brain) (NN stem)) (VP (VBZ regulates) (NP (NP (DT the) (NN rate)) (PP (IN of) (NP (NN breathing))))) (. .)))