( ( ( The ( vast majority ) ) ( of ( living arthropods ) ) ) ( ( belong ( to ( groups ( that ( are ( specialized ( for ( a ( land-dwelling existence ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ vast) (NN majority)) (PP (IN of) (NP (VBG living) (NNS arthropods)))) (VP (VBP belong) (PP (TO to) (NP (NP (NNS groups)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBG specialized) (PP (IN for) (NP (DT a) (JJ land-dwelling) (NN existence)))))))))) (. .)))
The vast majority of living arthropods belong to groups that are specialized for a land-dwelling existence.
(ROOT (S (NP (NP (DT The) (NN majority)) (PP (IN of) (NP (NNS arthropods)))) (VP (VBP live) (PP (IN on) (NP (NN land)))) (. .)))