( ( photoautotroph ( ( An organism ) ( able ( to ( ( ( use light ) ( as ( ( its ( sole source ) ) ( of ( energy ( and ( carbon dioxide ) ) ) ) ) ) ) ( as ( sole ( carbon source ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB photoautotroph) (S (NP (DT An) (NN organism)) (ADJP (JJ able) (S (VP (TO to) (VP (VB use) (NP (NN light)) (PP (IN as) (NP (NP (PRP$ its) (JJ sole) (NN source)) (PP (IN of) (NP (NN energy) (CC and) (NN carbon) (NN dioxide))))) (PP (IN as) (NP (JJ sole) (NN carbon) (NN source))))))))) (. .)))
photoautotroph An organism able to use light as its sole source of energy and carbon dioxide as sole carbon source.
(ROOT (S (NP (NNS Photoautotrophs)) (VP (VP (VB capture) (NP (JJ light) (NN energy))) (, ,) (CC and) (VP (VB use) (NP (NN carbon) (NN dioxide)) (PP (IN as) (NP (PRP$ their) (NN carbon) (NN source))))) (. .)))