(Plant operators) can be dirty.Logical formLearned from2 sentences. A dirty war may be supported.Logical formLearned from2 sentences. A dirty war may result in deaths of thousands of members of an (opposition party).Logical formLearned from2 sentences. Persons may disappear during dirty wars of 1970s.Logical formLearned from2 sentences. (War techniques) can be dirty.Logical formLearned from2 sentences. A struggle can be against a dirty war.Logical formLearned from2 sentences. A kind of dirty trick may be perpetrated against persons of a country.Logical formLearned from2 sentences. A victory can be against a dirty war.Logical formLearned from2 sentences. A country may direct a dirty war.Logical formLearned from2 sentences. A dirty war may wage against a country.Logical formLearned from2 sentences. A dirty war may include plans.Logical formLearned from2 sentences. A dirty war may strengthen a revolution.Logical formLearned from2 sentences. A dirty war may be imposed by a government.Logical formLearned from2 sentences. A dirty war may begin with an invasion of mercenaries.Logical formLearned from2 sentences. First ones can be with an intention of wear_downing a country.Logical formLearned from2 sentences.