How old are you talking about?
( ( How old ) ( ( ( are you ) ( talking about ) ) ? ) )
(ROOT (SBARQ (WHADJP (WRB How) (JJ old)) (SQ (VBP are) (NP (PRP you)) (VP (VBG talking) (IN about))) (. ?)))
Do you mean as a young child?
( ( ( Do you ) ( mean ( as ( a ( young child ) ) ) ) ) ? )
(ROOT (SQ (VBP Do) (NP (PRP you)) (VP (VB mean) (PP (IN as) (NP (DT a) (JJ young) (NN child)))) (. ?)))