Thousands can be constituted-of-or-filled-with (stone tools).Logical formLearned from19 sentences. A stone may be kept in a grotto.Logical formLearned from19 sentences. Stone can be under fire.Logical formLearned from19 sentences. (Thick clouds) of black smoke may obscure stone.Logical formLearned from19 sentences. Persons may use stones.Logical formLearned from19 sentences. A (foundation stone) may pertain-to a project.Logical formLearned from19 sentences. Stones can be at troops.Logical formLearned from19 sentences. A stone may be unturned in ensurring that something-is-the-case.Logical formLearned from19 sentences. Protesters may pelt stones.Logical formLearned from19 sentences. A girl may develop a (kidney stone).Logical formLearned from19 sentences. A boy may throw stones.Logical formLearned from19 sentences. A number of infants may suffer from (kidney stones).Logical formLearned from18 sentences. Some cubic meters can be constituted-of-or-filled-with stone.Logical formLearned from18 sentences. Stones can be colorless.Logical formLearned from18 sentences. Stones can be circular.Logical formLearned from18 sentences.