( ( What ( ( this means ) ( is ( that ( during photosynthesis ) ) ) ) ) ( , ( ( the plant ) ( ( will ( ( use ( light energy ) ) ( to ( manufacture glucose ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHNP (WP What)) (S (NP (DT this) (NNS means)) (VP (VBZ is) (NP (NP (DT that)) (PP (IN during) (NP (NN photosynthesis))))))) (, ,) (NP (DT the) (NN plant)) (VP (MD will) (VP (VB use) (NP (JJ light) (NN energy)) (S (VP (TO to) (VP (VB manufacture) (NP (NN glucose))))))) (. .)))
What this means is that during photosynthesis, the plant will use light energy to manufacture glucose.
(ROOT (S (PP (IN During) (NP (NN photosynthesis))) (, ,) (NP (NP (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (VP (VBZ is) (VP (VBN converted) (PP (TO to) (NP (NN glucose))) (PP (IN after) (S (VP (VBG entering) (NP (DT a) (NN plant))))))) (. .)))