( ( Hormones & ) Pheromones )
(ROOT (NP (NNS Hormones) (CC &) (NNS Pheromones)))
Hormones & Pheromones
(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))))))))))) (. .)))