( They ( all ( ( ( have ( four limbs ) ) ( except ( for ( ( ( the ( legless caecilians ) ) and ) ( ( a ( few species ) ) ( of ( salamander ( with ( ( ( reduced or ) no ) limbs ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (PRP They)) (ADVP (DT all)) (VP (VBP have) (NP (CD four) (NNS limbs)) (PP (IN except) (IN for) (NP (NP (DT the) (JJ legless) (NNS caecilians)) (CC and) (NP (NP (DT a) (JJ few) (NN species)) (PP (IN of) (NP (NP (NN salamander)) (PP (IN with) (NP (ADJP (JJ reduced) (CC or) (DT no)) (NNS limbs))))))))) (. .)))
They all have four limbs except for the legless caecilians and a few species of salamander with reduced or no limbs.
(ROOT (S (NP (DT All) (NNS mammals)) (VP (VBP have) (NP (CD four) (NNS limbs))) (. .)))