How far away?
( How ( far ( away ? ) ) )
(ROOT (FRAG (WHADVP (WRB How)) (ADJP (RB far) (RB away) (. ?))))
What is the distance?
( What ( ( is ( the distance ) ) ? ) )
(ROOT (SBARQ (WHNP (WP What)) (SQ (VBZ is) (NP (DT the) (NN distance))) (. ?)))