( Thermoregulation ( ( ( is also ) ( ( the process ) of ) ) ... ) )
(ROOT (S (NP (NNP Thermoregulation)) (VP (VBZ is) (ADVP (RB also)) (NP (NP (DT the) (NN process)) (PP (IN of)))) (: ...)))
Thermoregulation is also the process of...
(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))))))) (. .)))