Read the passage from A Doll’s House. Nora: And when she heard you had been appointed manager of the Bank—the news was telegraphed, you know—she travelled here as quick as she could. Torvald, I am sure you will be able to do something for Christine, for my sake, won't you? Helmer: Well, it is not altogether impossible. I presume you are a widow, Mrs. Linde? Mrs. Linde: Yes. Helmer: And have had some experience of book-keeping? Mrs. Linde: Yes, a fair amount. Helmer: Ah! well, it's very likely I may be able to find something for you— Nora: [clapping her hands] What did I tell you? What did I tell you? Helmer: You have just come at a fortunate moment, Mrs. Linde. Mrs. Linde: How am I to thank you? Helmer: There is no need. [Puts on his coat.] But today you must excuse me— Rank: Wait a minute; I will come with you. [Brings his fur coat from the hall and warms it at the fire.] Which element in this passage tells the reader who the characters are?