it follows the blair witch formula for an hour , in which we 're told something creepy and vague is in the works , and 
(ROOT (S (NP (PRP it)) (VP (VP (VBZ follows) (NP (DT the) (NN blair) (NN witch) (NN formula)) (PP (IN for) (NP (NP (DT an) (NN hour)) (, ,) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (PRP we)) (VP (VBP 're) (VP (VBN told) (SBAR (S (NP (NP (NN something)) (ADJP (JJ creepy) (CC and) (JJ vague))) (VP (VBZ is) (PP (IN in) (NP (DT the) (NNS works))))))))))))) (, ,) (CC and))))
(ROOT (S (NP (PRP )) (VP (VP (VBZ ) (NP (DT ) (NN ) (NN ) (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (, ) (SBAR (WHPP (IN ) (WHNP (WDT ))) (S (NP (PRP )) (VP (VBP ) (VP (VBN ) (SBAR (S (NP (NP (NN )) (ADJP (JJ ) (CC ) (JJ ))) (VP (VBZ ) (PP (IN ) (NP (DT ) (NNS ))))))))))))) (, ) (CC ))))