The type of parenthetical element that refers to specific nouns and begins with words like "who," "whom," and "where" is called a relative clause. Relative clauses provide additional information about a noun in a sentence and are often introduced by relative pronouns such as "who," "whom," "whose," "which," or "that." For example:
- The author who wrote the book gave a talk.
- The place where we met is very special.