A worst natural disaster can be in a history.Logical formLearned from147 sentences. An anniversary may pertain-to a (nuclear disaster).Logical formLearned from145 sentences. A president may declare a major disaster.Logical formLearned from145 sentences. A worst natural disaster can be in history.Logical formLearned from145 sentences. A string can be constituted-of-or-filled-with natural disasters.Logical formLearned from145 sentences. A disaster can be provincial.Logical formLearned from141 sentences. A (disaster declaration) can be presidential.Logical formLearned from141 sentences. Survivors may pertain-to a disaster.Logical formLearned from139 sentences. A (rail disaster) can be in some years.Logical formLearned from138 sentences. Consequences may pertain-to a disaster.Logical formLearned from137 sentences. Disasters can be declared.Logical formLearned from135 sentences. An enormity may pertain-to a disaster.Logical formLearned from135 sentences. A cost may pertain-to a disaster.Logical formLearned from134 sentences. A (peacetime maritime disaster) may pertain-to the world.Logical formLearned from134 sentences. Victims can be constituted-of-or-filled-with disaster.Logical formLearned from134 sentences.