how i killed my father compelling 
(ROOT (SBAR (WHADVP (WRB how)) (S (NP (PRP i)) (VP (VBD killed) (NP (PRP$ my) (NN father)) (ADVP (JJ compelling))))))
(ROOT (SBAR (WHADVP (WRB )) (S (NP (PRP )) (VP (VBD ) (NP (PRP$ ) (NN )) (ADVP (JJ ))))))