An emblem can be abstract.Logical formLearned from4 sentences. A citizen can be abstract.Logical formLearned from4 sentences. A channel can be abstract.Logical formLearned from4 sentences. (Data items) can be abstract.Logical formLearned from4 sentences. A (letter class) can be abstract.Logical formLearned from4 sentences. A cd-rom can be abstract.Logical formLearned from4 sentences. A (file system) can be abstract.Logical formLearned from4 sentences. A paragraph can be abstract.Logical formLearned from4 sentences. A (context information) can be abstract.Logical formLearned from4 sentences. Expressions can be abstract.Logical formLearned from4 sentences. A disquisition can be abstract.Logical formLearned from4 sentences. An intellectualism can be abstract.Logical formLearned from4 sentences. Blood can be abstract.Logical formLearned from4 sentences. (Response strategies) can be abstract.Logical formLearned from4 sentences. Methods can be abstract.Logical formLearned from4 sentences.