( Autotrophs ( ( ( ( ( ( obtain ( ( energy and ) nutrients ) ) ( by ( ( harnessing sunlight ) ( through ( photosynthesis ( -LRB- ( photoautotrophs -RRB- ) ) ) ) ) ) ) or ) ( , ( ( more rarely ) , ) ) ) ( ( obtain ( chemical energy ) ) ( through ( ( oxidation ( -LRB- ( chemoautotrophs -RRB- ) ) ) ( to ( ( make ( organic substances ) ) ( from ( inorganic ones ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Autotrophs)) (VP (VP (VB obtain) (NP (NN energy) (CC and) (NNS nutrients)) (PP (IN by) (S (VP (VBG harnessing) (NP (NN sunlight)) (PP (IN through) (NP (NP (NN photosynthesis)) (PRN (-LRB- -LRB-) (NP (NNS photoautotrophs)) (-RRB- -RRB-)))))))) (CC or) (PRN (, ,) (ADVP (RBR more) (RB rarely)) (, ,)) (VP (VB obtain) (NP (NN chemical) (NN energy)) (PP (IN through) (NP (NN oxidation) (PRN (-LRB- -LRB-) (NP (NNS chemoautotrophs)) (-RRB- -RRB-)) (S (VP (TO to) (VP (VB make) (NP (JJ organic) (NNS substances)) (PP (IN from) (NP (JJ inorganic) (NNS ones)))))))))) (. .)))
Autotrophs obtain energy and nutrients by harnessing sunlight through photosynthesis (photoautotrophs) or, more rarely, obtain chemical energy through oxidation (chemoautotrophs) to make organic substances from inorganic ones.
(ROOT (S (NP (NNS Photoautotrophs) (CC and) (NNS chemoautotrophs)) (VP (VBP are) (NP (NP (CD two) (JJ basic) (NNS types)) (PP (IN of) (NP (NNS autotrophs))))) (. .)))