( Capillaries ( ( are ( ( the ( smallest ( blood vessels ) ) ) ( in ( the body ) ) ) ) . ) )
(ROOT (S (NP (NNS Capillaries)) (VP (VBP are) (NP (NP (DT the) (JJS smallest) (NN blood) (NNS vessels)) (PP (IN in) (NP (DT the) (NN body))))) (. .)))
Capillaries are the smallest blood vessels in the body.
(ROOT (S (NP (NNS Capillaries)) (VP (VBP are) (NP (NP (DT the) (JJS smallest) (NN type)) (PP (IN of) (NP (NN blood) (NNS vessels))))) (. .)))