A (wave disaster) may pertain-to a country.Logical formLearned from33 sentences. Countries may be affected by a disaster.Logical formLearned from33 sentences. Cooperation can be in (disaster relief).Logical formLearned from32 sentences. A disaster may be avoided.Logical formLearned from32 sentences. A president may declare a state of disaster.Logical formLearned from32 sentences. A disaster may undergo a (death toll).Logical formLearned from32 sentences. Natural disasters can be repeated.Logical formLearned from32 sentences. A decade can be for (disaster reduction).Logical formLearned from32 sentences. Persons may have disasters.Logical formLearned from32 sentences. Potential can be for a disaster.Logical formLearned from32 sentences. A date may pertain-to a disaster.Logical formLearned from32 sentences. Signs can be constituted-of-or-filled-with disaster.Logical formLearned from32 sentences. A disaster may pertain-to a nature.Logical formLearned from32 sentences. Environmental disasters can be in history.Logical formLearned from32 sentences. A person may see a disaster.Logical formLearned from32 sentences.