( ( In ( any ( given ecosystem ) ) ) ( , ( organisms ( ( called ( producers ( ( ( ( obtain energy ) ( from ( ( the ( non-living environment ) ) ( -LRB- ( usually ( ( the sun ) -RRB- ) ) ) ) ) ) and ) ( ( convert it ) ( into ( a ( ( biologically useful ) form ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT any) (VBN given) (NN ecosystem))) (, ,) (NP (NNS organisms)) (VP (VBD called) (S (NP (NNS producers)) (VP (VP (VB obtain) (NP (NN energy)) (PP (IN from) (NP (NP (DT the) (JJ non-living) (NN environment)) (PRN (-LRB- -LRB-) (ADVP (RB usually)) (NP (DT the) (NN sun)) (-RRB- -RRB-))))) (CC and) (VP (VB convert) (NP (PRP it)) (PP (IN into) (NP (DT a) (ADJP (RB biologically) (JJ useful)) (NN form))))))) (. .)))
In any given ecosystem, organisms called producers obtain energy from the non-living environment (usually the sun) and convert it into a biologically useful form.
(ROOT (S (NP (NP (NNS Producers)) (PP (IN in) (NP (DT an) (NN ecosystem)))) (ADVP (RB generally)) (VP (VB get) (NP (PRP$ their) (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))