The Sentence Diagram Generator visually represents the grammatical structure of the sentence: "Chimamanda, a young and intelligent woman, is a highly regarded author who tells her story about her upbringing in Nigeria."
Main Clause: "Chimamanda is a highly regarded author"
Appositive Phrase: "a young and intelligent woman"
Relative Clause: "who tells her story about her upbringing in Nigeria"
This structure can be visually represented using the Sentence Diagram Generator to illustrate the relationships between the components of the sentence.