is nearly impossible to look at or understand 
(ROOT (S (VP (VBZ is) (ADJP (RB nearly) (JJ impossible) (SBAR (S (VP (TO to) (VP (VP (VB look) (PP (IN at))) (CC or) (VP (VB understand))))))))))
(ROOT (S (VP (VBZ ) (ADJP (RB ) (JJ ) (SBAR (S (VP (TO ) (VP (VP (VB ) (PP (IN ))) (CC ) (VP (VB ))))))))))