( ( The ( biramous arthropods ) ) ( ( ( ( do ( form ( a clade ) ) ) and ) ( are ( divided ( into ( ( ( a ( crustaceanomorph clade ) ) and ) ( ( an ( arachnomorph clade ) ) ( that ( includes ( the trilobites ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ biramous) (NNS arthropods)) (VP (VP (VBP do) (VP (VB form) (NP (DT a) (NN clade)))) (CC and) (VP (VBP are) (VP (VBN divided) (PP (IN into) (NP (NP (DT a) (JJ crustaceanomorph) (NN clade)) (CC and) (NP (NP (DT an) (JJ arachnomorph) (NN clade)) (SBAR (WHNP (WDT that)) (S (VP (VBZ includes) (NP (DT the) (NNS trilobites))))))))))) (. .)))
The biramous arthropods do form a clade and are divided into a crustaceanomorph clade and an arachnomorph clade that includes the trilobites.
(ROOT (S (NP (VBG Living) (NNS echinoderms)) (VP (VBD aredivided) (PP (IN into) (NP (CD five) (NNS clades)))) (. .)))