yawn were a kids of a missing chill , forward : .
(ROOT_0 (S_0 (ATS_3 (S_1 (NP_0 (NN_2 yawn)) (VP_5 (VBD_1 were) (NP_3 (NP_6 (DT_0 a) (NNS_1 kids)) (PP_0 (IN_1 of) (NP_6 (ATNP_0 (NP_6 (ATNP_1 (DT_0 a) (JJ_1 missing)) (NN_1 chill)) (COMMA_0 ,)) (ADVP_0 (RB_0 forward))))))) (COLON_0 :)) (DOT_0 .)))