It were who English <apostrophe>s dude .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 It)) (VP_4 (VBD_0 were) (SBAR_0 (WHNP_0 (WP_0 who)) (S_1 (NP_0 (NNP_0 English)) (VP_5 (VBZ_0 <apostrophe>s) (NP_2 (NN_3 dude))))))) (DOT_0 .)))