i have returned from the beyond to warn you 
(ROOT (S (NP (PRP i)) (VP (VBP have) (VP (VBN returned) (PP (IN from) (NP (DT the) (RB beyond))) (S (VP (TO to) (VP (VB warn) (NP (PRP you)))))))))
(ROOT (S (NP (PRP )) (VP (VBP ) (VP (VBN ) (PP (IN ) (NP (DT ) (RB ))) (S (VP (TO ) (VP (VB ) (NP (PRP )))))))))