of they the powdery attended shaking gravel .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (PP_1 (IN_1 of) (NP_0 (PRP_1 they))) (NP_5 (DT_0 the) (NN_2 powdery))) (VP_3 (VBD_1 attended) (VP_2 (VBG_0 shaking) (NP_5 (NN_3 gravel))))) (DOT_0 .)))