An appositive is a noun or a noun phrase that renames the noun next to it. It serves the purpose of adding information about another noun. For example, consider the phrase "The boy raced ahead to the finish line. " Adding an appositive noun phrase could result in "The boy, an avid sprinter, raced ahead to the finish line."
The sentence is still complete without the appositive. However, adding the appositive (an avid sprinter) presents more information about the other noun (boy).
There are several situations where a minority group stood up against the dominant group. One of the more famous examples is the Black Lives Matter movement. It is an international activist movement that advocates the protection of African-American against oppression and discrimination.