on stones with boy , Cochabamba happened baby . <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 on) (NP_3 (NP_4 (NNS_1 stones)) (PP_0 (IN_1 with) (NP_2 (NN_3 boy))))) (COMMA_0 ,)) (NP_0 (NNP_0 Cochabamba))) (VP_3 (VBD_1 happened) (NP_2 (NN_3 baby)))) (DOT_0 .)) (APOSTROPHE_0 <apostrophe><apostrophe>)))