( ( The acid ) ( ( reacts ( with ( ( a sensor ) ( which ( ( produces ( an ( intense ( green luminescence ) ) ) ) ( under ( ultraviolet light ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN acid)) (VP (VBZ reacts) (PP (IN with) (NP (NP (DT a) (NN sensor)) (SBAR (WHNP (WDT which)) (S (VP (VBZ produces) (NP (DT an) (JJ intense) (JJ green) (NN luminescence)) (PP (IN under) (NP (JJ ultraviolet) (NN light))))))))) (. .)))
The acid reacts with a sensor which produces an intense green luminescence under ultraviolet light.
(ROOT (S (NP (NP (NNP Producing) (NN light)) (PP (IN without) (NP (NN heat)))) (VP (VBZ is) (VP (VBN called) (S (ADJP (JJ luminescence))))) (. .)))