What did you choose?
( What ( ( ( did you ) choose ) ? ) )
(ROOT (SBARQ (WHNP (WP What)) (SQ (VBD did) (NP (PRP you)) (VP (VB choose))) (. ?)))
So you didn't pick any of them, then?
( So ( you ( ( ( did n't ) ( ( ( pick ( any ( of them ) ) ) , ) then ) ) ? ) ) )
(ROOT (S (IN So) (NP (PRP you)) (VP (VBD did) (RB n't) (VP (VB pick) (NP (NP (DT any)) (PP (IN of) (NP (PRP them)))) (, ,) (ADVP (RB then)))) (. ?)))