could have been a daytime soap opera 
(ROOT (S (VP (MD could) (VP (VB have) (VP (VBN been) (NP (DT a) (JJ daytime) (NN soap) (NN opera)))))))
(ROOT (S (VP (MD ) (VP (VB ) (VP (VBN ) (NP (DT ) (JJ ) (NN ) (NN )))))))