( ( ( Evolution ( of ( ( ( ( ( social behavior ) , ) pheromones ) and ) ( communication ( , ( ( organization and ) division ) ) ) ) ) ) ( of ( ( labor , ) ( social parasitism ) ) ) ) . )
(ROOT (NP (NP (NNP Evolution)) (PP (IN of) (NP (NP (JJ social) (NN behavior)) (, ,) (NP (NNS pheromones)) (CC and) (NP (NN communication) (, ,) (NN organization) (CC and) (NN division)))) (PP (IN of) (NP (NP (NN labor)) (, ,) (NP (JJ social) (NN parasitism)))) (. .)))
Evolution of social behavior, pheromones and communication, organization and division of labor, social parasitism.
(ROOT (S (NP (NNS Pheromones)) (VP (VBP enable) (NP (NP (NN communication)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADJP (JJ vital) (PP (IN for) (NP (NP (NNS organisms)) (PP (IN like) (NP (NP (NNS ants)) (SBAR (WHNP (WDT that)) (S (VP (VBP live) (PP (IN in) (NP (DT a) (JJ large) (NN community)))))))))))))))) (. .)))