( ( The ( carotid arteries ) ) ( ( are ( vital ( for ( living ( because ( they ( are ( ( the vessels ) ( that ( ( feed ( the blood ) ) ( to ( the brain ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ carotid) (NNS arteries)) (VP (VBP are) (ADJP (JJ vital) (PP (IN for) (S (VP (VBG living) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP are) (NP (NP (DT the) (NNS vessels)) (SBAR (WHNP (WDT that)) (S (VP (VBP feed) (NP (DT the) (NN blood)) (PP (TO to) (NP (DT the) (NN brain))))))))))))))) (. .)))
The carotid arteries are vital for living because they are the vessels that feed the blood to the brain.
(ROOT (S (NP (DT The) (JJ carotid) (NN artery)) (VP (VBZ takes) (NP (NN blood)) (PP (TO to) (NP (DT the) (NN brain)))) (. .)))
The carotid artery takes blood to the brain.