that is , more often then not , difficult and sad 
(ROOT (S (NP (DT that)) (VP (VBZ is) (, ,) (ADVP (ADVP (RBR more) (RB often)) (RB then) (RB not)) (, ,) (ADJP (JJ difficult) (CC and) (JJ sad)))))
(ROOT (S (NP (DT )) (VP (VBZ ) (, ) (ADVP (ADVP (RBR ) (RB )) (RB ) (RB )) (, ) (ADJP (JJ ) (CC ) (JJ )))))