( However ( , ( ( where ( there ( is ( ( strong pressure ) ( from predators ) ) ) ) ) ( , ( ( these animals ) ( themselves ( ( may ( become prey ) ) . ) ) ) ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (EX there)) (VP (VBZ is) (NP (NP (JJ strong) (NN pressure)) (PP (IN from) (NP (NNS predators))))))) (, ,) (NP (DT these) (NNS animals)) (ADVP (PRP themselves)) (VP (MD may) (VP (VB become) (NP (NN prey)))) (. .)))
However, where there is strong pressure from predators, these animals themselves may become prey.
(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.