( Pheromones ( ( are ( chemicals ( used ( for ( ( communication purposes ) ( between ( members ( of ( the ( same species ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Pheromones)) (VP (VBP are) (NP (NP (NNS chemicals)) (VP (VBN used) (PP (IN for) (NP (NP (NN communication) (NNS purposes)) (PP (IN between) (NP (NP (NNS members)) (PP (IN of) (NP (DT the) (JJ same) (NN species)))))))))) (. .)))
Pheromones are chemicals used for communication purposes between 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))))))))))) (. .)))