He asked no watched the classes of the sitting cluster on trips .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (ATVP_1 (VBD_0 asked) (RB_1 no)) (VP_1 (ATVP_2 (VBD_2 watched) (NP_3 (NP_6 (DT_0 the) (NNS_1 classes)) (PP_0 (IN_1 of) (NP_6 (ATNP_1 (DT_0 the) (VBG_0 sitting)) (NN_1 cluster))))) (PP_1 (IN_0 on) (NP_5 (NNS_1 trips)))))) (DOT_0 .)))