You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

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.
Solution: Who believes Fagin's gang make wallets and handkerchiefs?.
Why? This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.

New input: Passage: Seeking background material for a mystery he is working on, novelist Charles Condomine invites eccentric medium Madame Arcati to his home in Lympne, Kent, to conduct a séance. As Charles, his wife Ruth and their guests, George and Violet Bradman barely restrain themselves from laughing, Madame Arcati performs peculiar rituals and finally goes into a trance. Charles then hears the voice of his dead first wife, Elvira. When he discovers that the others cannot hear her, he passes off his odd behaviour as a joke. When Arcati recovers, she is certain that something extraordinary has occurred, but everyone denies it.
After Madame Arcati and the Bradmans have left, Charles is unable to convince Ruth that he was not joking. After Ruth retires for the night, Elvira becomes visible, but only to Charles. He becomes both dismayed and amused by the situation. Relations between Charles and Ruth become strained until he persuades Elvira to act as a poltergeist and transport a vase and a chair in front of his current wife.
Ruth seeks Madame Arcati's help in sending Elvira back where she came from, but the medium professes that she does not know how. Ruth warns her disbelieving husband that Elvira is seeking to be reunited with him by arranging his demise. However, the spirit miscalculates; Ruth, not Charles, drives off in the car she has tampered with and ends up dead. A vengeful Ruth, now in spirit form, harasses Elvira to the point that she wants to leave.
In desperation, Charles seeks Madame Arcati's help. Various incantations fail, until Arcati realises that it was the Condomines' maid Edith who summoned Elvira. Arcati appears to succeed in sending the spirits away, but it soon becomes clear that both have remained. Acting on Madame Arcati's suggestion, Charles sets out on a long vacation. However, he has a fatal accident as he is driving away, and he joins Elvira and Ruth as a spirit.
Solution:
What's the first name of the person the poltergeist was once married to?