(Forest ecosystems) can be sustainable.Logical formLearned from7 sentences. A percent may pertain-to national forests.Logical formLearned from7 sentences. A (forest type) can be dominant.Logical formLearned from7 sentences. Persons may have forest.Logical formLearned from7 sentences. Roads can be in forests.Logical formLearned from7 sentences. A (forest policy) may pertain-to persons.Logical formLearned from7 sentences. (Forest areas) can be virgin.Logical formLearned from7 sentences. Areas can be on national forests.Logical formLearned from7 sentences. Visits can be to a forest.Logical formLearned from7 sentences. A fifth may pertain-to forests.Logical formLearned from7 sentences. A (grazing allotment) may pertain-to a forest.Logical formLearned from7 sentences. Forests can be fantastic.Logical formLearned from7 sentences. Forests may undergo an overexploitation.Logical formLearned from7 sentences. Some forests can be in a region.Logical formLearned from7 sentences. A distribution of (forest types) may match.Logical formLearned from7 sentences.