(S (S (BASENP (DT The) (JJ local) (NNS authorities)) (VP (VBP expect) (SBAR (IN that) (S (NP (BASENP (DT this) (NN layer)) (PP (IN of) (BASENP (NN ash)))) (VP (VP (VBZ burns) (NP (BASENP (DT the) (NN coffee) (NNS plants)) (PP (IN of) (BASENP (DT the) (VBN affected) (NN area))))) (COMMA ,) (S (VP (VP (VBG decreasing) (NP (BASENP (DT the) (NN coffee) (NN production)) (PP (IN of) (BASENP (DT the) (NN region))))) (ADVP (RB considerably))))))))) (PERIOD .))