Pura , , were to braked what to .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_2 (NP_6 (NNP_1 Pura)) (COMMA_0 ,)) (COMMA_0 ,)) (VP_4 (VBD_2 were) (S_2 (VP_0 (TO_0 to) (VP_1 (VBN_0 braked) (SBAR_0 (WHNP_0 (WP_0 what)) (S_2 (VP_0 (TO_0 to))))))))) (DOT_0 .)))