since its poignancy hooks us completely 
(ROOT (SBAR (IN since) (S (NP (PRP$ its) (NN poignancy)) (VP (VBZ hooks) (NP (PRP us)) (ADVP (RB completely))))))
(ROOT (SBAR (IN ) (S (NP (PRP$ ) (NN )) (VP (VBZ ) (NP (PRP )) (ADVP (RB ))))))