What is the best way to revise this confusing sentence so that it is easier for the reader to understand?

During the medieval period wich group played an important role in staging

Read the sentence from last lecture by randy pausch. all right, so what we’re not talking about today, we are not talking about cancer, because i spent a lot of time talking about that and i’m really not interested. pausch tells his audience this because he wants them to know that

Why does the narrator come to the house of usher