You will be given a definition of a task first, then some input 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: Kenneth Magee, a young writer, bets $20,000 that he can write a Wuthering Heights-calibre novel in 24 hours. To get in the mood for the undertaking, he goes to a deserted Welsh manor. Upon his arrival, however, Magee discovers that the manor is not as empty as he was told. Still there are Lord Grisbane and his daughter, Victoria, who have been maintaining the mansion on their own. As the stormy night progresses, more people come to the mansion, including Lord Grisbane's sons Lionel and Sebastian, Magee's publisher's secretary, Mary Norton, and Corrigan, a potential buyer of the property.
After much coaxing, the Grisbanes reveal that they are here to release their brother, Roderick, who was imprisoned in his room for 40 years because he seduced a village girl when he was 14 and killed her when he found out she was pregnant. When they go to release him, they find the room empty and conclude that he broke out recently by breaking the bars in front of the window. Moments later, Lord Grisbane has a fatal heart attack. As Magee talks about getting the police, screams are heard and they find Victoria strangled to death. When Corrigan, Magee, and Mary decide to leave, they discover all of their cars have slashed tires. Soon, Diane and Andrew, a young couple who Magee met at the train station, arrive seeking shelter from the storm. They are soon killed when Diane washes her face with water that has been replaced by acid and Andrew drinks poisoned punch. The remaining five decide to find Roderick and kill him before he kills them.
Output:
Whose son killed a pregnant girl?