A (citation and/or) can be abstract of an article.Logical formLearned from2 sentences. A series can be constituted-of-or-filled-with abstract models.Logical formLearned from2 sentences. Abstract thinking may require spatial cognition.Logical formLearned from2 sentences. A graphical can be abstract.Logical formLearned from2 sentences. Some piece can be constituted-of-or-filled-with abstract art.Logical formLearned from2 sentences. (Task models) can be abstract.Logical formLearned from2 sentences. (Information objects) can be abstract.Logical formLearned from2 sentences. A (task model) can be abstract.Logical formLearned from2 sentences. A splendor can be abstract.Logical formLearned from2 sentences. A widget can be abstract.Logical formLearned from2 sentences. Perfection can be an abstract concept.Logical formLearned from2 sentences. Abstract paintings may pertain-to a period.Logical formLearned from2 sentences. Systems may define abstract structures.Logical formLearned from2 sentences. (Data semantics) can be abstract.Logical formLearned from2 sentences. An abstract class may mean that something-is-the-case.Logical formLearned from2 sentences.