should be tried as a war criminal 
(ROOT (VP (MD should) (VP (VB be) (VP (VBN tried) (PP (IN as) (NP (DT a) (NN war) (NN criminal)))))))
(ROOT (VP (MD ) (VP (VB ) (VP (VBN ) (PP (IN ) (NP (DT ) (NN ) (NN )))))))