What is an annonated example?

I believe you are referring to an annotated bibliography. An annotated bibliography is an extended form of citing work at the end of a paper (usually a research paper). In the MLA format, your annotated bibliography entry might look like this:

Picoult, Jodi. My Sister's Keeper. New York: Atria Books, 2004. Print.

The author's work of fiction focuses on the story of a young girl who was born to save her sister's life. Because of her sister's Leukemia, Anna often undergoes surgical

procedures in order to donate plasma and other essentials to her older sister Kate.

When Anna is about to donate one of her kidney's to her sister, she starts questioning

if she has the right to her own body and whether or not she can face letting her sister

die, or having the right to make her own decisions regarding her future medical

procedures.

In the above example, I wrote up an example annotated bibliography for "My Sister's Keeper" by Jodi Picoult. I could not get the formatting exactly right on here, but when you write the summary you should indent once for the entire block of text.