that parents could left on in the friend .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_1 that) (NNS_0 parents)) (VP_4 (MD_0 could) (VP_1 (ATVP_3 (VBD_2 left) (PRT_0 (RP_0 on))) (PP_0 (IN_1 in) (NP_5 (DT_0 the) (NN_2 friend)))))) (DOT_0 .)))