An introduction can be to concepts.Logical formLearned from241 sentences. A concept can be sound.Logical formLearned from239 sentences. A concept may undergo a definition.Logical formLearned from238 sentences. A concept may pertain-to a game.Logical formLearned from234 sentences. Concepts can be elementary.Logical formLearned from230 sentences. A concept can be exciting.Logical formLearned from220 sentences. A concept may be developed.Logical formLearned from218 sentences. Concepts may undergo a use.Logical formLearned from218 sentences. A concept can be in a country.Logical formLearned from217 sentences. A concept may pertain-to an international-political-entity.Logical formLearned from217 sentences. Concepts can be complicated.Logical formLearned from217 sentences. A concept can be intriguing.Logical formLearned from212 sentences. Concepts may be discussed.Logical formLearned from210 sentences. Concepts may pertain-to a female.Logical formLearned from208 sentences. A concept can be easy.Logical formLearned from208 sentences.