( Autotroph ( ( can ( be ( ( ( phototroph s ) or ) ( ( lithotroph s ) ( -LRB- ( chemoautotrophs -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Autotroph)) (VP (MD can) (VP (VB be) (VP (VP (VB phototroph) (NP (PRP s))) (CC or) (VP (VB lithotroph) (NP (PRP s)) (PRN (-LRB- -LRB-) (NP (NNS chemoautotrophs)) (-RRB- -RRB-)))))) (. .)))
Autotroph can be phototroph s or lithotroph s (chemoautotrophs).
(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))))) (. .)))