Santa's elves are also known as subordinate clauses. A subordinate clause is a part of a sentence that cannot stand alone as it does not express a complete thought, such as the clause "which had surfaced only 50m behind them" in the example sentence "The crew could see the whale, which had surfaced only 50m behind them." The document discusses subordinate clauses and provides an agenda that includes a final discussion, film screening, and wishes for happy holidays.