singing long after the credits roll 
(ROOT (S (VP (VBG singing) (SBAR (ADVP (RB long)) (IN after) (S (NP (DT the) (NNS credits)) (VP (VBP roll)))))))
(ROOT (S (VP (VBG ) (SBAR (ADVP (RB )) (IN ) (S (NP (DT ) (NNS )) (VP (VBP )))))))