A chair may sit empty.Logical formLearned from22 sentences. An apology can be empty.Logical formLearned from22 sentences. Assurances can be empty.Logical formLearned from22 sentences. Some buildings can be empty.Logical formLearned from21 sentences. Mills can be empty.Logical formLearned from21 sentences. A face can be empty.Logical formLearned from21 sentences. A castle can be empty.Logical formLearned from21 sentences. A movie can be empty.Logical formLearned from21 sentences. A bin can be empty.Logical formLearned from21 sentences. A couch can be empty.Logical formLearned from21 sentences. An uterus can be empty.Logical formLearned from21 sentences. Locations can be empty.Logical formLearned from21 sentences. (Table cells) can be empty.Logical formLearned from21 sentences. A system can be empty.Logical formLearned from21 sentences. A helmet can be empty.Logical formLearned from21 sentences.