( ( ( The insert ) ( above ( the ( LED diagram ) ) ) ) ( ( shows ( ( the electron ) ( in ( ( the diode ) ( going ( from ( a ( ( lower ( to ( ( a ( higher ( energy level ) ) ) ( by ( ( ( ( absorbing ( the ( input energies ) ) ) , ) and ) ( ( ( emitting ( light energy ) ) ( as ( the ( electron returns ) ) ) ) ( to ( its ( lower energy ) ) ) ) ) ) ) ) ) level ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN insert)) (PP (IN above) (NP (DT the) (NNP LED) (NN diagram)))) (VP (VBZ shows) (NP (NP (DT the) (NN electron)) (PP (IN in) (NP (NP (DT the) (NN diode)) (VP (VBG going) (PP (IN from) (NP (DT a) (ADJP (JJR lower) (PP (TO to) (NP (NP (DT a) (JJR higher) (NN energy) (NN level)) (PP (IN by) (S (VP (VP (VBG absorbing) (NP (DT the) (NN input) (NNS energies))) (, ,) (CC and) (VP (VBG emitting) (NP (JJ light) (NN energy)) (PP (IN as) (NP (DT the) (NN electron) (NNS returns))) (PP (TO to) (NP (PRP$ its) (JJR lower) (NN energy)))))))))) (NN level)))))))) (. .)))
The insert above the LED diagram shows the electron in the diode going from a lower to a higher energy level by absorbing the input energies, and emitting light energy as the electron returns to its lower energy level.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NNS electrons)) (VP (VB return) (PP (TO to) (NP (DT a) (JJR lower) (NN energy) (NN level)))))) (, ,) (NP (PRP they)) (VP (VBP emit) (NP (NP (DT the) (JJ excess) (NN energy)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NN light))))))) (. .)))