I an air n<apostrophe>t knew n<apostrophe>t try .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (NP_1 (PRP_0 I)) (ADVP_0 (NP_5 (DT_0 an) (NN_2 air)) (RB_1 n<apostrophe>t))) (VP_3 (ATVP_1 (VBD_0 knew) (RB_1 n<apostrophe>t)) (VP_1 (VB_0 try)))) (DOT_0 .)))