Squares can be vacant.Logical formLearned from15 sentences. Hikes can be vacant.Logical formLearned from15 sentences. Unit can be vacant.Logical formLearned from15 sentences. An archbishopric can be vacant.Logical formLearned from15 sentences. Some seat can be vacant.Logical formLearned from15 sentences. Apartments may be left vacant by deaths of tenants.Logical formLearned from15 sentences. Units can be vacant.Logical formLearned from15 sentences. A mall can be vacant.Logical formLearned from15 sentences. Some slots can be vacant.Logical formLearned from15 sentences. A (junior welterweight title) can be vacant.Logical formLearned from15 sentences. A net can be vacant.Logical formLearned from15 sentences. A channel can be vacant.Logical formLearned from15 sentences. Commercial buildings can be vacant.Logical formLearned from15 sentences. A (super flyweight title) can be vacant.Logical formLearned from15 sentences. A (middleweight crown) can be vacant.Logical formLearned from15 sentences.