( ( some odors ) ( ( are ( from ( ( the ( animals ' ) ) feed ) ) ) ; ) )
(ROOT (S (NP (DT some) (NNS odors)) (VP (VBP are) (PP (IN from) (NP (NP (DT the) (NNS animals) (POS ')) (NN feed)))) (: ;)))
some odors are from the animals' feed;
(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.