Head may pertain-to a hierarchy.Logical formLearned from6 sentences. A hierarchy can be creative.Logical formLearned from6 sentences. Hierarchies can be interlocking.Logical formLearned from6 sentences. A hierarchy may pertain-to a school.Logical formLearned from6 sentences. A hierarchy may pertain-to sciences.Logical formLearned from6 sentences. A hierarchy can be enforced.Logical formLearned from6 sentences. A standing can be in a (college football hierarchy).Logical formLearned from6 sentences. A hierarchy of needs can be a theory.Logical formLearned from6 sentences. A ladder may pertain-to a hierarchy.Logical formLearned from6 sentences. A hierarchy may pertain-to a school.Logical formLearned from6 sentences. Hierarchies may be flattened.Logical formLearned from6 sentences. A hierarchy can be solid.Logical formLearned from6 sentences. A hierarchy can be with a (designer -while).Logical formLearned from6 sentences. Needs can be in a hierarchy.Logical formLearned from6 sentences. Views may show a hierarchy.Logical formLearned from6 sentences.