object to the idea of a vietnam picture 
(ROOT (S (VP (VB object) (PP (IN to) (NP (NP (DT the) (NN idea)) (PP (IN of) (NP (DT a) (NNP vietnam) (NN picture))))))))
(ROOT (S (VP (VB ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NNP ) (NN ))))))))