interesting both as a historical study and as a tragic love story 
(ROOT (ADJP (JJ interesting) (PP (CC both) (PP (IN as) (NP (DT a) (JJ historical) (NN study))) (CC and) (PP (IN as) (NP (DT a) (JJ tragic) (NN love) (NN story))))))
(ROOT (ADJP (JJ ) (PP (CC ) (PP (IN ) (NP (DT ) (JJ ) (NN ))) (CC ) (PP (IN ) (NP (DT ) (JJ ) (NN ) (NN ))))))