( ( Pheromones ( -LRB- ( fear-uh-moans -RRB- ) ) ) ( ( Substances ( that ( ( act ( like chemical ) ) ( signals ( in ( communicating ( with ( ( other members ) ( of ( the ( same species ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Pheromones)) (PRN (-LRB- -LRB-) (NP (NNS fear-uh-moans)) (-RRB- -RRB-))) (VP (VBZ Substances) (SBAR (IN that) (S (NP (NP (NN act)) (PP (IN like) (NP (NN chemical)))) (VP (VBZ signals) (PP (IN in) (S (VP (VBG communicating) (PP (IN with) (NP (NP (JJ other) (NNS members)) (PP (IN of) (NP (DT the) (JJ same) (NN species)))))))))))) (. .)))
Pheromones (fear-uh-moans) Substances that act like chemical signals in communicating with other members of the same species.
(ROOT (S (NP (NNS Pheromones)) (VP (VBP are) (VP (VBN released) (PP (IN into) (NP (NP (DT the) (NN environment)) (PP (IN for) (NP (NP (NN communication)) (PP (IN between) (NP (NP (NNS animals)) (PP (IN of) (NP (DT the) (JJ same) (NN species))))))))))) (. .)))