( ( ( ( Decrease ( blood pressure ) ) and ) ( reduce ( stress Dogs ) ) ) ( ( have ( been ( shown ( to ( ( reduce ( blood pressure ) ) ( in ( ( a number ) ( of populations ) ) ) ) ) ) ) ) . ) )
(ROOT (S (S (VP (VP (VB Decrease) (NP (NN blood) (NN pressure))) (CC and) (VP (VB reduce) (NP (NN stress) (NNS Dogs))))) (VP (VBP have) (VP (VBN been) (VP (VBN shown) (S (VP (TO to) (VP (VB reduce) (NP (NN blood) (NN pressure)) (PP (IN in) (NP (NP (DT a) (NN number)) (PP (IN of) (NP (NNS populations))))))))))) (. .)))
Decrease blood pressure and reduce stress Dogs have been shown to reduce blood pressure in a number of populations.
(ROOT (S (S (VP (VBG Reducing) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN in) (NP (DT a) (JJ rigid) (NN container)))))))) (VP (VBZ causes) (NP (NN pressure)) (S (VP (TO to) (VP (VB decrease))))) (. .)))