an impressive job of relating the complicated history of the war 
(ROOT (NP (NP (DT an) (JJ impressive) (NN job)) (PP (IN of) (S (VP (VBG relating) (NP (NP (DT the) (JJ complicated) (NN history)) (PP (IN of) (NP (DT the) (NN war)))))))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (S (VP (VBG ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN )))))))))