(S (S (BASENP (DT The) (JJ same) (NNP May) (NN survey)) (VP (VBD indicated) (SBAR (IN that) (S (NP (BASENP (NN duck) (NNS habitats)) (PRN (COMMA ,) (BASENP (RB specifically) (NNS ponds)) (COMMA ,))) (VP (VBD had) (VP (VP (VBN declined) (NP (QP (ADVP (RBR more) (IN than)) (NN 35)) (NN percent))) (PP (IN from) (BASENP (DT the) (JJ historical) (NN average))))))))) (PERIOD .))