What have we for lunch? 
( What ( ( ( have we ) ( for lunch ) ) ? ) )
(ROOT (SBARQ (WHNP (WP What)) (SQ (VP (VBP have) (NP (PRP we)) (PP (IN for) (NP (NN lunch))))) (. ?)))
What are we going to eat for lunch?
( What ( ( ( are we ) ( going ( to ( eat ( for lunch ) ) ) ) ) ? ) )
(ROOT (SBARQ (WHNP (WP What)) (SQ (VBP are) (NP (PRP we)) (VP (VBG going) (S (VP (TO to) (VP (VB eat) (PP (IN for) (NP (NN lunch)))))))) (. ?)))