( Pheromones ( ( are ( ( volatile chemicals ) ( produced ( by ( a ( given ( species ( to ( ( communicate ( with ( ( other individuals ) ( of ( the ( same species ) ) ) ) ) ) ( to ( change ( their behavior ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Pheromones)) (VP (VBP are) (NP (NP (JJ volatile) (NNS chemicals)) (VP (VBN produced) (PP (IN by) (NP (DT a) (VBN given) (NN species) (S (VP (TO to) (VP (VB communicate) (PP (IN with) (NP (NP (JJ other) (NNS individuals)) (PP (IN of) (NP (DT the) (JJ same) (NN species))))) (S (VP (TO to) (VP (VB change) (NP (PRP$ their) (NN behavior))))))))))))) (. .)))
Pheromones are volatile chemicals produced by a given species to communicate with other individuals of the same species to change their behavior.
(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))))))))))) (. .)))