( ( Flaccidity ( in ( all ( four limbs ) ) ) ) . )
(ROOT (NP (NP (NNP Flaccidity)) (PP (IN in) (NP (DT all) (CD four) (NNS limbs))) (. .)))
Flaccidity in all four limbs.
(ROOT (S (NP (DT All) (NNS mammals)) (VP (VBP have) (NP (CD four) (NNS limbs))) (. .)))