EXERCISE CMS 2–6Recognizing common knowledge in Chicago papers
Example:

Small’s Paradise, one of the most famous nightclubs of the Harlem Renaissance, was the only well-known New York nightclub of the era owned by an African American.

Common knowledge

Needs citation

This information is not available in a variety of common reference sources, so it is not common knowledge and needs citation. Also, a claim of only needs to be cited.