( Typically ( ( ( the muscles ) ( surrounding ( the notochord ) ) ) ( ( are ( arranged ( in ( distinct segments ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Typically)) (NP (NP (DT the) (NNS muscles)) (VP (VBG surrounding) (NP (DT the) (NN notochord)))) (VP (VBP are) (VP (VBN arranged) (PP (IN in) (NP (JJ distinct) (NNS segments))))) (. .)))
Typically the muscles surrounding the notochord are arranged in distinct segments.
(ROOT (S (NP (DT The) (NN notochord)) (VP (VBZ provides) (S (NP (NNS stiffness)) (VP (TO to) (VP (VB counterbalance) (NP (NP (DT the) (NN pull)) (PP (IN of) (NP (NNS muscles)))))))) (. .)))