(Swimming pools) can be empty.Logical formLearned from64 sentences. A board can be empty.Logical formLearned from64 sentences. A station can be empty.Logical formLearned from64 sentences. Packages can be empty.Logical formLearned from63 sentences. Cubicles can be empty.Logical formLearned from63 sentences. Plains can be empty.Logical formLearned from63 sentences. A room can be empty.Logical formLearned from63 sentences. A document can be empty.Logical formLearned from63 sentences. Tins can be empty.Logical formLearned from63 sentences. Posts can be empty.Logical formLearned from63 sentences. Camps can be empty.Logical formLearned from63 sentences. Stores can be empty.Logical formLearned from63 sentences. Blocks can be empty.Logical formLearned from63 sentences. Chambers can be empty.Logical formLearned from62 sentences. A gym can be empty.Logical formLearned from62 sentences.