( ( ( ( ( This compound ) , ) ( when ( ( mixed ( in ( water ( with ( potassium ( ( ferro-cyanide and ) hydrogen ) ) ) ) ) ) peroxide ) ) ) , ) ( ( produces ( ( ( a chemi ) - ) ( luminescence ( that ( matches ( ( the light ) ( of ( the firefly ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN compound)) (, ,) (SBAR (WHADVP (WRB when)) (S (S (ADJP (VBN mixed) (PP (IN in) (NP (NP (NN water)) (PP (IN with) (NP (NN potassium) (NN ferro-cyanide) (CC and) (NN hydrogen))))))) (VP (VBP peroxide)))) (, ,)) (VP (VBZ produces) (NP (NP (DT a) (NN chemi)) (: -) (NP (NP (NN luminescence)) (SBAR (WHNP (WDT that)) (S (VP (VBZ matches) (NP (NP (DT the) (NN light)) (PP (IN of) (NP (DT the) (NN firefly)))))))))) (. .)))
This compound, when mixed in water with potassium ferro-cyanide and hydrogen peroxide, produces a chemi- luminescence that matches the light of the firefly.
(ROOT (S (NP (NP (NNP Producing) (NN light)) (PP (IN without) (NP (DT a) (JJ high) (NN temperature)))) (VP (VBZ is) (VP (VBN called) (S (ADJP (JJ luminescence))))) (. .)))