which they have been patiently waiting for 
(ROOT (SBAR (WHNP (WDT which)) (S (NP (PRP they)) (VP (VBP have) (VP (VBN been) (ADVP (RB patiently)) (VP (VBG waiting) (PP (IN for))))))))
(ROOT (SBAR (WHNP (WDT )) (S (NP (PRP )) (VP (VBP ) (VP (VBN ) (ADVP (RB )) (VP (VBG ) (PP (IN ))))))))