( ( Four ( paired demonstrations ) ) ( ( are ( performed ( showing ( ( chemical energy ) ( converted ( to ( ( ( ( ( ( ( light energy ) , ) ( electrical energy ) ) , ) ( mechanical ( energy ( and ( heat energy ) ) ) ) ) and ) ( vice versa ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD Four) (JJ paired) (NNS demonstrations)) (VP (VBP are) (VP (VBN performed) (S (VP (VBG showing) (NP (NP (NN chemical) (NN energy)) (VP (VBN converted) (PP (TO to) (NP (NP (JJ light) (NN energy)) (, ,) (NP (JJ electrical) (NN energy)) (, ,) (NP (JJ mechanical) (NN energy) (CC and) (NN heat) (NN energy)) (CC and) (NP (NN vice) (NNS versa)))))))))) (. .)))
Four paired demonstrations are performed showing chemical energy converted to light energy, electrical energy, mechanical energy and heat energy and vice versa.
(ROOT (S (S (NP (DT The) (NN energy)) (VP (VBZ transformations) (SBAR (IN that) (S (VP (VBP occur) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (NN candle) (NNS burns)) (VP (VBZ is) (VP (VBN described) (PP (IN by))))))))))) (: :) (S (NP (NP (NN chemical) (NN energy)) (PP (IN from) (NP (DT the) (NN wax)))) (VP (VBZ is) (VP (VBN converted) (PP (IN into) (NP (NN light) (CC and) (NN heat) (NN energy)))))) (. .)))