the fun wears thin -- then out -- when there 's nothing else happening 
(ROOT (S (NP (DT the) (NN fun)) (VP (VP (VBZ wears) (S (ADJP (JJ thin)))) (, --) (RB then) (INTJ (RP out)) (, --) (SBAR (WHADVP (WRB when)) (S (NP (EX there)) (VP (VBZ 's) (NP (NP (NP (NN nothing)) (JJ else)) (VP (VBG happening)))))))))
(ROOT (S (NP (DT ) (NN )) (VP (VP (VBZ ) (S (ADJP (JJ )))) (, ) (RB ) (INTJ (RP )) (, ) (SBAR (WHADVP (WRB )) (S (NP (EX )) (VP (VBZ ) (NP (NP (NP (NN )) (JJ )) (VP (VBG )))))))))