( ( ( Capillary -- ) ( ( Smallest ( blood vessels ) ) ( in ( the body ) ) ) ) . )
(ROOT (NP (NP (NNP Capillary)) (: --) (NP (NP (NNP Smallest) (NN blood) (NNS vessels)) (PP (IN in) (NP (DT the) (NN body)))) (. .)))
Capillary -- Smallest blood vessels in the body.
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (VP (VBN transferred) (PP (IN through) (NP (NNS capillaries))))) (. .)))