( ( In ( a ( light bulb ) ) ) ( , ( ( electrical energy ) ( ( is ( transformed ( into ( ( ( useful light ) energy ) ( -LRB- ( and ( ( some ( non-useful ( thermal energy ) ) ) -RRB- ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT a) (JJ light) (NN bulb))) (, ,) (NP (JJ electrical) (NN energy)) (VP (VBZ is) (VP (VBN transformed) (PP (IN into) (NP (NP (ADJP (JJ useful) (JJ light)) (NN energy)) (PRN (-LRB- -LRB-) (CC and) (NP (NP (DT some)) (NP (JJ non-useful) (JJ thermal) (NN energy))) (-RRB- -RRB-)))))) (. .)))
In a light bulb, electrical energy is transformed into useful light energy (and some non-useful thermal energy).
(ROOT (S (PP (IN In) (NP (NP (DT the) (NN case)) (PP (IN of) (NP (DT a) (JJ light) (NN bulb))))) (, ,) (NP (NN electricity)) (VP (VBZ is) (VP (VBN converted) (PP (TO to) (NP (JJ light) (CC and) (JJ thermal) (NN energy))))) (. .)))