A (death toll) can be unknown.Logical formLearned from159 sentences. Motives can be unknown.Logical formLearned from152 sentences. A number of persons can be unknown.Logical formLearned from151 sentences. An effect can be unknown.Logical formLearned from148 sentences. A date of birth can be unknown.Logical formLearned from145 sentences. Places can be unknown.Logical formLearned from144 sentences. A number of casualties can be unknown.Logical formLearned from140 sentences. An impact can be unknown.Logical formLearned from137 sentences. A cause of a death can be unknown.Logical formLearned from137 sentences. A relationship can be unknown.Logical formLearned from134 sentences. A male may remain unknown.Logical formLearned from130 sentences. Others can be unknown.Logical formLearned from128 sentences. A reason may remain unknown.Logical formLearned from128 sentences. A cause of a disease can be unknown.Logical formLearned from126 sentences. A source can be unknown.Logical formLearned from125 sentences.