every joke is repeated at least -- annoying , is n't it ? 
(ROOT (S (NP (DT every) (NN joke)) (VP (VBZ is) (VP (VBN repeated) (ADVP (IN at) (JJS least)) (, --) (ADJP (JJ annoying)) (, ,) (VBZ is) (RB n't) (NP (PRP it)))) (. ?)))
(ROOT (S (NP (DT ) (NN )) (VP (VBZ ) (VP (VBN ) (ADVP (IN ) (JJS )) (, ) (ADJP (JJ )) (, ) (VBZ ) (RB ) (NP (PRP )))) (. )))