( Oregon ( ( In ( Oregon four ) ) ( ( greenhouse operators ) ( ( use ( geothermal energy ) ) . ) ) ) )
(ROOT (S (NP (NNP Oregon)) (PP (IN In) (NP (NNP Oregon) (CD four))) (NP (NN greenhouse) (NNS operators)) (VP (VBP use) (NP (JJ geothermal) (NN energy))) (. .)))
Oregon In Oregon four greenhouse operators use geothermal energy.
(ROOT (S (NP (JJ Geothermal) (NN energy) (NN energy)) (VP (VP (VBZ is) (ADJP (JJ clean))) (CC and) (VP (VBZ does) (RB not) (VP (VB release) (NP (NN greenhouse) (NNS gases))))) (. .)))