What is a relative pronoun

A relative pronoun is a word that introduces a dependent (or relative) clause and connects it to an independent clause.

Explanation:

Like adjectives, these clauses in some way describe that subject. Relative pronouns, like conjunctions, are words that join clauses—in this case, a relative clause to its main clause.

wheres the following authors?

black citizens were denied access to the same public facilities as whitesun.

marriages between white and nonwhite citizens were forbidden.

nonwhite citizens were required to carry identification papers with them at all times.