( ( ( Present-day ( plate ( motion constraint ) ) ) ( on ( mantle ( ( rheology and ) convection ) ) ) ) . )
(ROOT (NP (NP (JJ Present-day) (NN plate) (NN motion) (NN constraint)) (PP (IN on) (NP (JJ mantle) (NN rheology) (CC and) (NN convection))) (. .)))
Present-day plate motion constraint on mantle rheology and convection.
(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))))))))))) (. .)))