Shells may pertain-to a person.Logical formLearned from144 sentences. A shell may pertain-to species.Logical formLearned from140 sentences. Some shells may fall.Logical formLearned from139 sentences. A shell may have a shape.Logical formLearned from138 sentences. Shells may explode.Logical formLearned from138 sentences. A shell can be tough.Logical formLearned from136 sentences. Shells can be hollow.Logical formLearned from134 sentences. A shell can be unexploded.Logical formLearned from133 sentences. A shell can be black.Logical formLearned from130 sentences. Shells can be tart.Logical formLearned from124 sentences. Shells can be available for members.Logical formLearned from123 sentences. Persons may break a shell.Logical formLearned from122 sentences. A shell can be blackened.Logical formLearned from122 sentences. A shell can be heavy.Logical formLearned from122 sentences. Shells may land.Logical formLearned from121 sentences.