there 's nothing else happening 
(ROOT (S (NP (EX there)) (VP (VBZ 's) (NP (NP (NP (NN nothing)) (JJ else)) (VP (VBG happening))))))
(ROOT (S (NP (EX )) (VP (VBZ ) (NP (NP (NP (NN )) (JJ )) (VP (VBG ))))))