He motioned to me as if they were going to cut off his head.
( He ( ( ( motioned ( to me ) ) ( as ( if ( they ( were ( going ( to ( ( cut off ) ( his head ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD motioned) (PP (TO to) (NP (PRP me))) (SBAR (RB as) (IN if) (S (NP (PRP they)) (VP (VBD were) (VP (VBG going) (S (VP (TO to) (VP (VB cut) (PRT (RP off)) (NP (PRP$ his) (NN head)))))))))) (. .)))
He made a gesture at me like the people intended to decapitate him.
( He ( ( ( ( made ( a gesture ) ) ( at me ) ) ( like ( ( the people ) ( intended ( to ( decapitate him ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD made) (NP (DT a) (NN gesture)) (PP (IN at) (NP (PRP me))) (PP (IN like) (NP (NP (DT the) (NNS people)) (VP (VBN intended) (S (VP (TO to) (VP (VB decapitate) (NP (PRP him))))))))) (. .)))