(Coal mine accidents) may kill some persons.Logical formLearned from21 sentences. An accident may happen in an area.Logical formLearned from21 sentences. An accident may derail (peace efforts).Logical formLearned from21 sentences. An accident can be isolated.Logical formLearned from21 sentences. An accident may be cleared.Logical formLearned from21 sentences. An accident may happen in hours.Logical formLearned from21 sentences. An accident can be large-scale.Logical formLearned from21 sentences. Some persons may miss after an accident.Logical formLearned from21 sentences. A (mining accident) can be in a country.Logical formLearned from21 sentences. A rise can be in a number of accidents.Logical formLearned from21 sentences. (Road accidents) may claim some lives.Logical formLearned from21 sentences. An accident can be a setback.Logical formLearned from21 sentences. An accident may involve a plane.Logical formLearned from20 sentences. A person may flee after an accident.Logical formLearned from20 sentences. Lessons may be learnt from an accident.Logical formLearned from20 sentences.