around something knew later could know gone .
(ROOT_0 (S_0 (ATS_3 (NP_1 (IN_2 around) (NN_3 something)) (VP_4 (ATVP_1 (VBD_0 knew) (RB_1 later)) (VP_5 (MD_0 could) (VP_1 (VB_0 know) (VP_2 (VBN_0 gone)))))) (DOT_0 .)))