( Autotrophs ( ( ( are also ) ( referred ( to ( ( ( ( as producers ) , ) and ) ( heterotrophs ( as consumers ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Autotrophs)) (VP (VBP are) (ADVP (RB also)) (VP (VBN referred) (PP (TO to) (NP (NP (RB as) (NNS producers)) (, ,) (CC and) (NP (NP (NNS heterotrophs)) (PP (IN as) (NP (NNS consumers)))))))) (. .)))
Autotrophs are also referred to as producers , and heterotrophs as consumers .
(ROOT (S (NP (NNS Heterotrophs)) (VP (VBZ is) (NP (NP (DT another) (NN name)) (PP (IN for) (NP (NNS consumers))))) (. .)))