( ( In ( the episode ) ) ( , ( SpongeBob ( ( becomes ( stranded ( in ( ( an ( aphotic zone ) ) ( called ( Rock Bottom ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (NN episode))) (, ,) (NP (NNP SpongeBob)) (VP (VBZ becomes) (VP (VBN stranded) (PP (IN in) (NP (NP (DT an) (JJ aphotic) (NN zone)) (VP (VBN called) (NP (NNP Rock) (NNP Bottom))))))) (. .)))
In the episode, SpongeBob becomes stranded in an aphotic zone called Rock Bottom.
(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))))) (. .)))