A (protein structure) can be three-dimensional.Logical formLearned from26 sentences. Structures may change.Logical formLearned from26 sentences. Structures can be narrow.Logical formLearned from26 sentences. Owners can be constituted-of-or-filled-with structures.Logical formLearned from26 sentences. Structures can be entrenched.Logical formLearned from26 sentences. Structures can be practical.Logical formLearned from26 sentences. A basic structure may pertain-to a constitution.Logical formLearned from26 sentences. A structure may pertain-to an island.Logical formLearned from26 sentences. A structure can be constituted-of-or-filled-with steel.Logical formLearned from26 sentences. A backbone may pertain-to a structure.Logical formLearned from26 sentences. A structure may pertain-to a test.Logical formLearned from26 sentences. A structure can be ceremonial.Logical formLearned from26 sentences. A (structure formation) can be large-scale.Logical formLearned from26 sentences. A structure may pertain-to architecture.Logical formLearned from26 sentences. A structure may be studied.Logical formLearned from26 sentences.