( ( For instance ) ( , ( ( in ( a ( light bulb ) ) ) ( , ( ( ( the ( electric ( potential energy ) ) ) ( of ( the charge ) ) ) ( ( is ( transformed ( into ( ( ( ( ( light energy ) ( -LRB- ( ( a ( useful form ) ) -RRB- ) ) ) and ) ( thermal energy ) ) ( -LRB- ( ( a ( non-useful form ) ) -RRB- ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN For) (NP (NN instance))) (, ,) (PP (IN in) (NP (DT a) (JJ light) (NN bulb))) (, ,) (NP (NP (DT the) (JJ electric) (JJ potential) (NN energy)) (PP (IN of) (NP (DT the) (NN charge)))) (VP (VBZ is) (VP (VBN transformed) (PP (IN into) (NP (NP (JJ light) (NN energy)) (PRN (-LRB- -LRB-) (NP (DT a) (JJ useful) (NN form)) (-RRB- -RRB-)) (CC and) (NP (JJ thermal) (NN energy)) (PRN (-LRB- -LRB-) (NP (DT a) (JJ non-useful) (NN form)) (-RRB- -RRB-)))))) (. .)))
For instance, in a          light bulb, the electric potential energy of the charge is          transformed into light energy ( a useful form) and thermal          energy (a non-useful form).
(ROOT (S (NP (DT A) (JJ light) (NN bulb)) (VP (VBZ converts) (NP (JJ electrical) (NN energy)) (PP (TO to) (NP (JJ light) (CC and) (JJ thermal) (NN energy)))) (. .)))