Structures can be safe.Logical formLearned from30 sentences. A structure may pertain-to a skull.Logical formLearned from30 sentences. A structure can be inefficient.Logical formLearned from30 sentences. A (capital structure) can be efficient.Logical formLearned from30 sentences. Persons may need structures.Logical formLearned from30 sentences. Structures may be located.Logical formLearned from30 sentences. A structure can be on a planet.Logical formLearned from30 sentences. An overhaul may pertain-to structures.Logical formLearned from30 sentences. An (ownership structure) may pertain-to a group.Logical formLearned from30 sentences. A (command structure) can be streamlined.Logical formLearned from30 sentences. A structure may pertain-to a foot.Logical formLearned from30 sentences. Structures can be larger.Logical formLearned from29 sentences. A structure may pertain-to a storm.Logical formLearned from29 sentences. A structure may date from a century.Logical formLearned from29 sentences. Structures can be on a site.Logical formLearned from29 sentences.