Context: For example, character 10 represents the "line feed" function (which causes a printer to advance its paper), and character 8 represents "backspace". RFC 2822 refers to control characters that do not include carriage return, line feed or white space as non-whitespace control characters. Except for the control characters that prescribe elementary line-oriented formatting, ASCII does not define any mechanism for describing the structure or appearance of text within a document. Other schemes, such as markup languages, address page and document layout and formatting.

Question: What does the "line feed" function do?
Answer: causes a printer to advance its paper

Question: What character represents the "line feed" function?
Answer: character 10

Question: What does character 8 represent? 
Answer: backspace

Question: What does RFC 2822 refers to what kind of control characters?
Answer: control characters that do not include carriage return, line feed or white space as non-whitespace control characters

Question: What do the "line feed" control characters do?
Answer: Unanswerable

Question: What markup languages represent the "line feed" function?
Answer: Unanswerable

Question: What does document layout does 8 represent?
Answer: Unanswerable

Question: RFC 2822 translates what kind of languages?
Answer: Unanswerable

Question: What does not define any mechanism for carriage return?
Answer: Unanswerable