whether we 're supposed to shriek 
(ROOT (SBAR (IN whether) (S (NP (PRP we)) (VP (VBP 're) (VP (VBN supposed) (S (VP (TO to) (VP (VB shriek)))))))))
(ROOT (SBAR (IN ) (S (NP (PRP )) (VP (VBP ) (VP (VBN ) (S (VP (TO ) (VP (VB )))))))))