(S (S (S (BASENP (NN Fuel) (NNS costs)) (VP (VBP have) (VP (VBN fallen)))) (CONJP (COMMA ,) (CC but)) (S (BASENP (JJ previous) (NN hedging)) (VP (VBZ has) (VP (VBN negated) (BASENP (DT this) (NN benefit)))))) (PERIOD .))