( ( ( The ( pelagic part ) ) ( of ( the ( aphotic zone ) ) ) ) ( ( can ( be ( further ( ( divided ( into ( vertical regions ) ) ) ( according ( to temperature ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ pelagic) (NN part)) (PP (IN of) (NP (DT the) (JJ aphotic) (NN zone)))) (VP (MD can) (VP (VB be) (VP (ADVP (RBR further)) (VBN divided) (PP (IN into) (NP (JJ vertical) (NNS regions))) (PP (VBG according) (PP (TO to) (NP (NN temperature))))))) (. .)))
The pelagic part of the aphotic zone can be further divided into vertical regions according to temperature.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT the) (JJ lightless) (NN part)) (PP (IN of) (NP (DT the) (NN ocean) (JJ aphotic) (NN zone))))) (. .)))