seen some bad singer-turned actors 
(ROOT (S (VP (VBN seen) (NP (DT some) (JJ bad) (ADJP (NN singer) (HYPH -) (VBN turned)) (NNS actors)))))
(ROOT (S (VP (VBN ) (NP (DT ) (JJ ) (ADJP (NN ) (HYPH ) (VBN )) (NNS )))))