( ( ( One clade ) ( of bowerbirds ) ) ( ( build ( ( ( ( so-called ( maypole bowers ) ) , ) ( which ( are ( constructed ( by placing ) ) ) ) ) ( sticks ( around ( a sapling ) ) ) ) ) ; ) )
(ROOT (S (NP (NP (CD One) (NN clade)) (PP (IN of) (NP (NNS bowerbirds)))) (VP (VBP build) (SBAR (S (NP (NP (JJ so-called) (NN maypole) (NNS bowers)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADJP (VBN constructed) (PP (IN by) (S (VP (VBG placing))))))))) (VP (VBZ sticks) (PP (IN around) (NP (DT a) (NN sapling))))))) (: ;)))
One clade of bowerbirds build so-called maypole bowers, which are constructed by placing sticks around a sapling;
(ROOT (S (NP (DT A) (NN clade)) (VP (VBZ is) (NP (NP (CD one) (NN way)) (PP (IN of) (NP (VBG classifying) (NNS organisms))))) (. .)))