( ( By ( comparing ( ( the depth ) ( of ( ( this ( dipping interface ) ) ( with ( ( the locations ) ( of ( deep ( ( -LRB- ( ( ( > 40 ) km ) -RRB- ) ) earthquakes ) ) ) ) ) ) ) ) ) ) ( , ( we ( ( hope ( to ( determine ( whether ( ( the earthquakes ) ( lie ( within ( ( the ( ( ( mantle or ) crustal ) part ) ) ( of ( the ( subducted plate ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN By) (S (VP (VBG comparing) (NP (NP (DT the) (NN depth)) (PP (IN of) (NP (NP (DT this) (VBG dipping) (NN interface)) (PP (IN with) (NP (NP (DT the) (NNS locations)) (PP (IN of) (NP (JJ deep) (PRN (-LRB- -LRB-) (NP (QP (CD >) (CD 40)) (NNS km)) (-RRB- -RRB-)) (NNS earthquakes))))))))))) (, ,) (NP (PRP we)) (VP (VBP hope) (S (VP (TO to) (VP (VB determine) (SBAR (IN whether) (S (NP (DT the) (NNS earthquakes)) (VP (VBP lie) (PP (IN within) (NP (NP (DT the) (ADJP (JJ mantle) (CC or) (JJ crustal)) (NN part)) (PP (IN of) (NP (DT the) (JJ subducted) (NN plate)))))))))))) (. .)))
By comparing the depth of this dipping interface with the locations of deep (&gt;40 km) earthquakes, we hope to determine whether the earthquakes lie within the mantle or crustal part of the subducted plate.
(ROOT (S (NP (NNS Earthquakes)) (VP (VBP mark) (NP (NP (DT the) (NNS motions)) (PP (IN of) (NP (NP (VBG colliding) (NNS plates)) (CC and) (NP (NP (DT the) (NNS locations)) (SBAR (WHADVP (WRB where)) (S (NP (NNS plates)) (VP (VBP plunge) (PP (IN into) (NP (DT the) (NN mantle))))))))))) (. .)))