( They ( ( ( ( ( are ( ( not ( the cleanest ) ) ( of animals ) ) ) , ) and ) ( carry ( a ( strong odor ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VP (VBP are) (NP (NP (RB not) (DT the) (NN cleanest)) (PP (IN of) (NP (NNS animals))))) (, ,) (CC and) (VP (VBP carry) (NP (DT a) (JJ strong) (NN odor)))) (. .)))
They are not the cleanest of animals, and  carry a strong odor.
(ROOT (S (NP (JJ Strong) (NN odor)) (VP (VBZ helps) (S (NP (DT some) (NNS animals)) (VP (VB defend) (NP (PRP themselves)) (PP (IN against) (NP (NNS predators)))))) (. .)))
Strong odor helps some animals defend themselves against predators.