( ( ( ( Volcanic arcs ) and ) ( oceanic trenches ) ) ( partly ( ( ( ( ( encircling ( the ( Pacific ( Basin form ) ) ) ) ( ( the ( so-called Ring ) ) ( of Fire ) ) ) , ) ( ( a zone ) ( of ( ( ( frequent earthquakes ) and ) ( volcanic eruptions ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (JJ Volcanic) (NNS arcs)) (CC and) (NP (JJ oceanic) (NNS trenches))) (ADVP (RB partly)) (VP (VBZ encircling) (NP (DT the) (NNP Pacific) (NNP Basin) (NN form)) (NP (NP (DT the) (JJ so-called) (NN Ring)) (PP (IN of) (NP (NNP Fire)))) (, ,) (NP (NP (DT a) (NN zone)) (PP (IN of) (NP (NP (JJ frequent) (NNS earthquakes)) (CC and) (NP (JJ volcanic) (NNS eruptions)))))) (. .)))
Volcanic arcs and oceanic trenches partly encircling the Pacific Basin form the so-called Ring of Fire, a zone of frequent earthquakes and volcanic eruptions.
(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))))) (. .)))