Complex sentence: But before we can learn more, Mr. Brown and Cora (Tamela Mann) come in and get acquainted with everyone, who is surprised to learn that Madea is Cora's mother.
Split into simpler sentences: But before we can learn more, Mr. Brown and Cora (Tamela Mann) come in and get acquainted with everyone. Everyone is surprised to learn that Madea is Cora's mother.