( ( ( All organisms ) ( in ( a clade ) ) ) ( ( share ( common ancestry ) ) . ) )
(ROOT (S (NP (NP (DT All) (NNS organisms)) (PP (IN in) (NP (DT a) (NN clade)))) (VP (VBP share) (NP (JJ common) (NN ancestry))) (. .)))
All organisms in a clade share common ancestry.
(ROOT (S (NP (DT A) (NN clade)) (VP (VBZ is) (NP (NP (CD one) (NN way)) (PP (IN of) (NP (VBG classifying) (NNS organisms))))) (. .)))