( It ( ( is ( said ( ( some ( of ( these canals ) ) ) ( are ( ( 200 meters ) deep ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (VP (VBD said) (SBAR (S (NP (NP (DT some)) (PP (IN of) (NP (DT these) (NNS canals)))) (VP (VBP are) (ADJP (NP (CD 200) (NNS meters)) (JJ deep))))))) (. .)))
It is said some of these canals are 200 meters deep.
(ROOT (S (NP (DT The) (JJ photic) (NN zone)) (VP (VBZ extends) (ADJP (NP (CD 200) (NNS meters)) (JJ deep))) (. .)))
The photic zone extends 200 meters deep.