Subordinate clauses are the clauses that are dependent and cannot stand alone as a complete sentence. They are included in a sentence to complement the other words in the sentence, adding meaning to the whole unit.
In the given sentence, the subordinate clause is <em>"before Raffi in Disney appeared". </em>This is evident with the use of the word "before" which is a dependent clause. This allows the dependent clause to be part of the whole sentence structure but cannot stand as a complete sentence on its own.
Thus, the subordinate clause is <em>"Before Raffi in Disney appeared."</em>
In "The Second Coming", Yeats alludes to the second coming of Jesus Christ and the book of Revelations. His theory on gyres and human life cycles link to this idea that history will repeat itself. There was a WWI so there will be a WWII.