A stone can be nice.Logical formLearned from52 sentences. Students may throw stones.Logical formLearned from51 sentences. A tour may pertain-to stones.Logical formLearned from51 sentences. Stones can be slippery.Logical formLearned from51 sentences. Thousands can be constituted-of-or-filled-with stones.Logical formLearned from51 sentences. Stones can be clear.Logical formLearned from51 sentences. Villagers may throw stones.Logical formLearned from51 sentences. (Stone streets) can be narrow.Logical formLearned from51 sentences. A stone may pertain-to a country.Logical formLearned from51 sentences. Mobs may throw stones.Logical formLearned from51 sentences. Stones can be jagged.Logical formLearned from51 sentences. Stones can be pointed.Logical formLearned from50 sentences. A stone may undergo a use.Logical formLearned from50 sentences. A set can be constituted-of-or-filled-with (stone steps).Logical formLearned from50 sentences. A mother can be with (kidney stones).Logical formLearned from50 sentences.