( ( Thermoregulation ( to Maintain ) ) Homeostasis )
(ROOT (NP (ADJP (JJ Thermoregulation) (PP (TO to) (NP (NNP Maintain)))) (NNPS Homeostasis)))
Thermoregulation to Maintain Homeostasis
(ROOT (S (NP (NNP Thermoregulation)) (VP (VBZ is) (NP (NP (DT the) (NN process)) (SBAR (WHNP (WHADVP (WRB when)) (NNS animals)) (S (VP (VBP maintain) (NP (DT an) (JJ internal) (NN temperature))))))) (. .)))