An (island jungle) can be constituted-of-or-filled-with rivers.Logical formLearned from3 sentences. Soldiers may be helicoptered to a (jungle frontier).Logical formLearned from3 sentences. (Jungle camps) can be barbed.Logical formLearned from3 sentences. Fighting may explode across jungles.Logical formLearned from3 sentences. Front lines can be in jungles of the north.Logical formLearned from3 sentences. Jungles can be for a (hostage handover).Logical formLearned from3 sentences. (Jungle camps) may be seized.Logical formLearned from3 sentences. Illness can be in (jungle camps).Logical formLearned from3 sentences. Barbed wire can be in (jungle prisons).Logical formLearned from3 sentences. A handover can be in a (jungle clearing).Logical formLearned from3 sentences. Treks can be through a jungle.Logical formLearned from3 sentences. A slab may be topped with low jungle.Logical formLearned from3 sentences. A jungle can be ruthless.Logical formLearned from3 sentences. An area may be nestled in (mountain jungles).Logical formLearned from3 sentences. Some (defense contractors) may crash in jungles.Logical formLearned from3 sentences.