( ( Materials ( that ( demonstrate fluorescence ) ) ) ( ( are ( those ( that ( can ( ( ( ( ( ( absorb energy ) ( in ( ( the ( ( ( near-ultraviolet and ) visible ) regions ) ) ( of ( the ( electromagnetic spectrum ) ) ) ) ) ) ( from ( the sun ) ) ) , ) then ) ( ( reemit ( the energy ) ) ( as ( ( longer wavelength ) ( visible light ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Materials)) (SBAR (WHNP (WDT that)) (S (VP (VBP demonstrate) (ADJP (JJ fluorescence)))))) (VP (VBP are) (NP (NP (DT those)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VP (VB absorb) (NP (NN energy)) (PP (IN in) (NP (NP (DT the) (ADJP (JJ near-ultraviolet) (CC and) (JJ visible)) (NNS regions)) (PP (IN of) (NP (DT the) (JJ electromagnetic) (NN spectrum))))) (PP (IN from) (NP (DT the) (NN sun)))) (, ,) (RB then) (VP (VB reemit) (NP (DT the) (NN energy)) (PP (IN as) (NP (NP (JJR longer) (NN wavelength)) (ADJP (JJ visible) (JJ light))))))))))) (. .)))
Materials that demonstrate fluorescence are those that can absorb energy in the near-ultraviolet and visible regions of the electromagnetic spectrum from the sun, then reemit the energy as longer wavelength visible light.
(ROOT (S (NP (DT The) (JJ light-producing) (NN process) (NN fluorescence)) (VP (VBZ occurs) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (NN substance)) (VP (VP (VBZ absorbs) (NP (JJ shorter-wavelength) (JJ ultraviolet) (NN light))) (CC and) (VP (ADVP (RB then)) (VBZ gives) (PRT (RP off)) (NP (NP (DT the) (NN energy)) (PP (IN as) (NP (JJ visible) (NN light))))))))) (. .)))