( ( ( ( thermal light ) , ) ( luminescence light ) ) . )
(ROOT (NP (NP (JJ thermal) (NN light)) (, ,) (NP (JJ luminescence) (NN light)) (. .)))
thermal light, luminescence light.
(ROOT (S (NP (NNP Luminescence)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (NP (DT the) (NN process)) (SBAR (WHADVP (WRB where)) (S (NP (NN light)) (VP (VBZ is) (VP (VBN produced) (PP (IN without) (NP (NN heat))))))))))) (. .)))