A concept may pertain-to a planet.Logical formLearned from20 sentences. Concepts can be constituted-of-or-filled-with disease.Logical formLearned from20 sentences. Concepts can be related.Logical formLearned from20 sentences. Concepts may pertain-to a topic.Logical formLearned from20 sentences. Concepts can be easy.Logical formLearned from20 sentences. A person may describe a concept.Logical formLearned from20 sentences. (Security concepts) can be basic.Logical formLearned from20 sentences. A concept can be wonderful.Logical formLearned from20 sentences. A person may work on a concept.Logical formLearned from20 sentences. Concepts can be narrow.Logical formLearned from20 sentences. A concept may pertain-to a nature.Logical formLearned from19 sentences. A concept may expand.Logical formLearned from19 sentences. A concept may have roots.Logical formLearned from19 sentences. A concept can be constituted-of-or-filled-with fear.Logical formLearned from19 sentences. A view may show a concept.Logical formLearned from19 sentences.