 We're just, we just we don't know who he is.
( We ( ( ( ( 're just ) , ) ( we ( just ( we ( ( do n't ) ( know ( who ( he is ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP 're) (ADVP (RB just)) (, ,) (S (NP (PRP we)) (SBAR (RB just) (S (NP (PRP we)) (VP (VBP do) (RB n't) (VP (VB know) (SBAR (WHNP (WP who)) (S (NP (PRP he)) (VP (VBZ is)))))))))) (. .)))
We are working to find out who he is.
( We ( ( are ( working ( to ( ( find out ) ( who ( he is ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP are) (VP (VBG working) (S (VP (TO to) (VP (VB find) (PRT (RP out)) (SBAR (WHNP (WP who)) (S (NP (PRP he)) (VP (VBZ is))))))))) (. .)))