A structure may pertain-to a system.Logical formLearned from679 sentences. Some structures may be solved for a class of enzymes.Logical formLearned from665 sentences. A structure can be vertical.Logical formLearned from661 sentences. A structure can be modular.Logical formLearned from650 sentences. A structure may pertain-to the world.Logical formLearned from638 sentences. Structures can be democratic.Logical formLearned from635 sentences. A structure may pertain-to a system.Logical formLearned from594 sentences. A structure may pertain-to a brain.Logical formLearned from585 sentences. Structures can be simple.Logical formLearned from581 sentences. A structure may be make_uped of a collection of pieces.Logical formLearned from580 sentences. A structure can be complicated.Logical formLearned from577 sentences. A structure can be solid.Logical formLearned from564 sentences. Variety can be constituted-of-or-filled-with structures.Logical formLearned from559 sentences. A structure may pertain-to the economy.Logical formLearned from555 sentences. A structure may pertain-to a government.Logical formLearned from555 sentences.