qualities that were once amusing are becoming irritating . 
(ROOT (S (NP (NP (NNS qualities)) (SBAR (WHNP (WDT that)) (S (VP (VBD were) (ADVP (RB once)) (ADJP (JJ amusing)))))) (VP (VBP are) (VP (VBG becoming) (ADJP (JJ irritating)))) (. .)))
(ROOT (S (NP (NP (NNS )) (SBAR (WHNP (WDT )) (S (VP (VBD ) (ADVP (RB )) (ADJP (JJ )))))) (VP (VBP ) (VP (VBG ) (ADJP (JJ )))) (. )))