interminably bleak , to say nothing of boring . 
(ROOT (S (ADJP (RB interminably) (JJ bleak)) (, ,) (S (VP (TO to) (VP (VB say) (NP (NP (NN nothing)) (PP (IN of) (ADJP (JJ boring))))))) (. .)))
(ROOT (S (ADJP (RB ) (JJ )) (, ) (S (VP (TO ) (VP (VB ) (NP (NP (NN )) (PP (IN ) (ADJP (JJ ))))))) (. )))