An anniversary may pertain-to a disaster.Logical formLearned from62 sentences. A disaster can be for the economy.Logical formLearned from62 sentences. A severity may pertain-to a disaster.Logical formLearned from62 sentences. A political-leader can be a disaster.Logical formLearned from62 sentences. An (air disaster) can be in a country.Logical formLearned from62 sentences. Some disaster can be in a country.Logical formLearned from62 sentences. A disaster can be secular.Logical formLearned from61 sentences. A disaster may pertain-to month.Logical formLearned from61 sentences. A toll can be from a disaster.Logical formLearned from61 sentences. A trip can be a disaster.Logical formLearned from61 sentences. Site may pertain-to a nuclear disaster.Logical formLearned from61 sentences. Disasters can be around the world.Logical formLearned from60 sentences. A disaster can be for persons.Logical formLearned from60 sentences. A (root cause) may pertain-to a disaster.Logical formLearned from60 sentences. A humanitarian disaster can be in a country.Logical formLearned from59 sentences.