does an impressive job of relating the complicated history of the war and of filling in the background . 
(ROOT (S (VP (VBZ does) (NP (NP (DT an) (JJ impressive) (NN job)) (PP (PP (IN of) (S (VP (VBG relating) (NP (NP (DT the) (JJ complicated) (NN history)) (PP (IN of) (NP (DT the) (NN war))))))) (CC and) (PP (IN of) (S (VP (VBG filling) (PRT (IN in)) (NP (DT the) (NN background)))))))) (. .)))
(ROOT (S (VP (VBZ ) (NP (NP (DT ) (JJ ) (NN )) (PP (PP (IN ) (S (VP (VBG ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN ))))))) (CC ) (PP (IN ) (S (VP (VBG ) (PRT (IN )) (NP (DT ) (NN )))))))) (. )))