( It ( ( is ( ( a device ) ( that ( ( converts ( light energy ) ) ( into ( electrical energy ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (DT a) (NN device)) (SBAR (WHNP (WDT that)) (S (VP (VBZ converts) (NP (JJ light) (NN energy)) (PP (IN into) (NP (JJ electrical) (NN energy)))))))) (. .)))
It is a device that converts light energy into electrical energy.
(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)))) (. .)))