( ( ( ( Arthropoda ( are ( jointed-foot invertebrates ) ) ) : ) ( ( ( ( arachnids , ) crustaceans ) , ) ( insects etc. ) ) ) . )
(ROOT (S (S (NP (NNP Arthropoda)) (VP (VBP are) (NP (JJ jointed-foot) (NNS invertebrates)))) (: :) (S (NP (NP (NNS arachnids)) (, ,) (NP (NNS crustaceans)) (, ,)) (VP (VBZ insects) (NP (FW etc.)))) (. .)))
Arthropoda are jointed-foot invertebrates: arachnids, crustaceans, insects etc.
(ROOT (S (SBAR (IN While) (FRAG (ADJP (JJ similar) (PP (TO to) (NP (NNS insects)))))) (, ,) (NP (NNS arachnids)) (VP (VBP are) (NP (NP (JJ eight-legged) (NNS invertebrates)) (SBAR (WHNP (WDT that)) (S (VP (VBP lack) (NP (NN antennae) (CC or) (NNS wings))))))) (. .)))