(S (S (NP (BASENP (NNS Greenhouses)) (PP (IN in) (BASENP (DT the) (NN region)))) (VP (ADVP (RB currently)) (VP (VBP employ) (NP (QP (ADVP (RBR more) (IN than)) (NN 4,000)) (NNS people))))) (PERIOD .))