which are such that we 'll keep watching the skies for his next project 
(ROOT (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADJP (JJ such) (SBAR (IN that) (S (NP (PRP we)) (VP (MD 'll) (VP (VB keep) (S (VP (VBG watching) (NP (DT the) (NNS skies)) (PP (IN for) (NP (PRP$ his) (JJ next) (NN project))))))))))))))
(ROOT (SBAR (WHNP (WDT )) (S (VP (VBP ) (ADJP (JJ ) (SBAR (IN ) (S (NP (PRP )) (VP (MD ) (VP (VB ) (S (VP (VBG ) (NP (DT ) (NNS )) (PP (IN ) (NP (PRP$ ) (JJ ) (NN ))))))))))))))