( ( In ( the firefly ) ) ( , ( luminescence ( ( is ( produced ( by ( ( a substance ) ( called ( `` Lucifer ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (NN firefly))) (, ,) (NP (NN luminescence)) (VP (VBZ is) (VP (VBN produced) (PP (IN by) (NP (NP (DT a) (NN substance)) (VP (VBN called) (S (`` ``) (NP (NNP Lucifer)))))))) (. .)))
In the firefly, luminescence is produced by a substance called &quot;Lucifer.
(ROOT (S (NP (NP (NNP Producing) (NN light)) (PP (IN without) (NP (NN heat)))) (VP (VBZ is) (VP (VBN called) (S (ADJP (JJ luminescence))))) (. .)))