( ( The ( solar ( electric systems ) ) ) ( ( ( convert ( ( the ( radiant energy ) ) ( of ( the sun ) ) ) ) ( directly ( into ( ( ( electrical energy ) , ) ( which ( ( can then ) ( be ( used ( as ( ( ( most electrical ) energy ) ( is ( used today ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ solar) (JJ electric) (NNS systems)) (VP (VBP convert) (NP (NP (DT the) (ADJP (JJ radiant)) (NN energy)) (PP (IN of) (NP (DT the) (NN sun)))) (PP (ADVP (RB directly)) (IN into) (NP (NP (JJ electrical) (NN energy)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD can) (RB then) (VP (VB be) (VP (VBN used) (SBAR (IN as) (S (NP (ADJP (RBS most) (JJ electrical)) (NN energy)) (VP (VBZ is) (VP (VBN used) (NP (NN today)))))))))))))) (. .)))
The solar electric systems convert the radiant energy of the sun directly into electrical energy, which can then be used as most electrical energy is used today.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (DT the) (NN energy)) (VP (VBN used) (PP (IN by) (NP (VBG living) (NNS things))))))) (VP (VBZ comes) (ADVP (CC either) (RB directly) (CC or) (RB indirectly)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))
Most of the energy used by living things comes either directly or indirectly from the sun.