( ( Because ( ( ( ( earthquakes and ) often ) volcanoes ) ( can ( be ( found ( along ( ( all ( three types ) ) ( of ( plate boundary ) ) ) ) ) ) ) ) ) ( , ( ( plate ( tectonic theory ) ) ( ( not only ) ( ( ( is ( important ( in ( scientific study ) ) ) ) ( it ( also ( has ( significance ( for ( people ( living ( near ( those boundaries ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (IN Because) (S (NP (UCP (NP (NNS earthquakes)) (CC and) (ADVP (RB often))) (NNS volcanoes)) (VP (MD can) (VP (VB be) (VP (VBN found) (PP (IN along) (NP (NP (DT all) (CD three) (NNS types)) (PP (IN of) (NP (NN plate) (NN boundary)))))))))) (, ,) (NP (NN plate) (JJ tectonic) (NN theory)) (ADVP (RB not) (RB only)) (VP (VBZ is) (ADJP (JJ important) (PP (IN in) (NP (JJ scientific) (NN study)))) (SBAR (S (NP (PRP it)) (ADVP (RB also)) (VP (VBZ has) (NP (NP (NN significance)) (PP (IN for) (NP (NP (NNS people)) (VP (VBG living) (PP (IN near) (NP (DT those) (NNS boundaries))))))))))) (. .)))
Because earthquakes and often volcanoes can be found along all three types of plate boundary, plate tectonic theory not only is important in scientific study it also has significance for people living near those boundaries.
(ROOT (S (NP (NP (DT The) (JJ vast) (NN majority)) (PP (IN of) (NP (NN earthquake)))) (VP (VBZ occurs) (PRT (RP along)) (NP (NP (CD one)) (PP (IN of) (NP (NP (CD three) (NNS types)) (PP (IN of) (NP (NN plate) (NNS boundaries))))))) (. .)))