In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Let me give you an example: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Question: Who believes Fagin's gang make wallets and handkerchiefs?
The answer to this example can be: Oliver.
Here is why: In the sentence "He believes they make wallets and handkerchiefs", the pronoun "he" refers to name "Oliver".

OK. solve this:
Passage: Father Gregory Lind, is a Catholic priest struggling with his life in the priesthood. He wishes to change parishes, but is denied the transfer time after time. The story starts with him arriving at the local hospital after being informed that one of his charges is dying after trying to steal a car. He meets there Pamela Gibson a widowed and rich social worker from the local Community Center. Together they decide to find out more about the deceased teen. The pair checks up on Estella Rios, the boy's pregnant, underage girlfriend. They don't agree on what should be done about her and later Father Lind finds out from Mrs. Rios that Pamela took Estalla to probably get an abortion. This leads to more arguments between the two, but they lose importance when the girl ends up in a hospital and miscarries. The social worker breaks down and Father Lind ends up having sex with her, after taking her back home.
Question: What is the last name of the person who ends up having sex with the rich social worker?
Answer:
Lind.