`` this native could stop to used murky .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (TICK_0 ``) (NP_1 (DT_1 this) (NN_2 native))) (VP_3 (MD_0 could) (VP_1 (VB_0 stop) (S_2 (VP_0 (TO_0 to) (VP_1 (VBN_0 used) (ADJP_0 (JJ_0 murky)))))))) (DOT_0 .)))