A height may pertain-to a shell.Logical formLearned from181 sentences. A tank may fire a shell.Logical formLearned from181 sentences. Shells can be fossil.Logical formLearned from180 sentences. A color may pertain-to a shell.Logical formLearned from171 sentences. Shells can be phosphorous.Logical formLearned from167 sentences. A shell may kill some persons.Logical formLearned from165 sentences. Shells can be broken.Logical formLearned from164 sentences. Shells can be blue.Logical formLearned from160 sentences. Shells may fall.Logical formLearned from159 sentences. Some shells may explode.Logical formLearned from158 sentences. A shell can be broken.Logical formLearned from157 sentences. A shell can be burned-out.Logical formLearned from155 sentences. Shells can be thin.Logical formLearned from152 sentences. A surface may pertain-to a shell.Logical formLearned from147 sentences. A shell may pertain-to persons.Logical formLearned from145 sentences.