you stifled the alpaca bottle by the friend .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 you)) (VP_4 (VBD_0 stifled) (NP_3 (NP_6 (ATNP_1 (DT_0 the) (NN_3 alpaca)) (NN_1 bottle)) (PP_0 (IN_1 by) (NP_5 (DT_0 the) (NN_2 friend)))))) (DOT_0 .)))