( ( On Earth ) ( , ( ( mantle convection ) ( ( ( moves ( ( large pieces ) ( of ( ( ( ( ( ( ( ( ( ( ( the surface ) , ) ( the ( geologic plates ) ) ) , ) and ) ( most volcanos ) ) , ) earthquakes ) , ) and ) ( mountains form ) ) ) ) ) ( at ( plate boundaries ) ) ) . ) ) ) )
(ROOT (S (PP (IN On) (NP (NNP Earth))) (, ,) (NP (JJ mantle) (NN convection)) (VP (VBZ moves) (NP (NP (JJ large) (NNS pieces)) (PP (IN of) (NP (NP (DT the) (NN surface)) (, ,) (NP (DT the) (JJ geologic) (NNS plates)) (, ,) (CC and) (NP (JJS most) (NNS volcanos)) (, ,) (NP (NNS earthquakes)) (, ,) (CC and) (NP (NNS mountains) (NN form))))) (PP (IN at) (NP (NN plate) (NNS boundaries)))) (. .)))
On Earth, mantle convection moves large pieces of the surface, the geologic plates, and most volcanos, earthquakes, and mountains form at plate boundaries.
(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))))))))))) (. .)))