They piled The muddy valley as these air , of it .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (ATVP_3 (ATVP_2 (VBD_2 piled) (NP_3 (NP_6 (ATNP_1 (DT_0 The) (JJ_1 muddy)) (NN_1 valley)) (PP_0 (IN_1 as) (NP_5 (DT_0 these) (NN_2 air))))) (COMMA_0 ,)) (PP_1 (IN_1 of) (NP_0 (PRP_1 it))))) (DOT_0 .)))