i walked away not really know who `` they '' were , what `` they '' looked like . 
(ROOT (S (NP (PRP i)) (VP (VBD walked) (ADVP (RB away)) (ADVP (RB not) (RB really)) (VP (VB know) (SBAR (SBAR (WHNP (WP who)) (S (`` ``) (NP (PRP they)) ('' '') (VP (VBD were)))) (, ,) (SBAR (WHNP (WP what)) (S (`` ``) (NP (PRP they)) ('' '') (VP (VBD looked) (PP (IN like)))))))) (. .)))
(ROOT (S (NP (PRP )) (VP (VBD ) (ADVP (RB )) (ADVP (RB ) (RB )) (VP (VB ) (SBAR (SBAR (WHNP (WP )) (S (`` ) (NP (PRP )) ('' ) (VP (VBD )))) (, ) (SBAR (WHNP (WP )) (S (`` ) (NP (PRP )) ('' ) (VP (VBD ) (PP (IN )))))))) (. )))