(S (S (BASENP (DT The) (NNP Dirty) (NNP War)) (VP (VBZ refers) (PP (TO to) (NP (NP (NP (NP (BASENP (DT the) (NN use)) (PP (IN of) (BASENP (NN state) (NN terrorism)))) (PP (IN in) (BASENP (NNP Latin) (NNP America)))) (PP (IN in) (NP (BASENP (DT a) (NN period)) (PP (PP (IN from) (BASENP (DT the) (NNS 1960s))) (PP (TO to) (BASENP (DT the) (NNS 1980s))))))) (COMMA ,) (VP (ADVP (RB usually)) (VP (VBN targeted) (PP (IN at) (NP (NP (BASENP (NNS groups)) (VP (VBN opposed) (PP (TO to) (BASENP (DT the) (NN government))))) (PRN (LRB -LRB-) (NP (ADVP (RB usually)) (BASENP (NN leftist) (NNS groups))) (RRB -RRB-)))))))))) (PERIOD .))