Definition: 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.
Input: Passage: The story starts in sequence with 16-year-old Alison Findlay and her two friends playing a seemingly innocent ouija board game. Upon contacting a spirit, who is later revealed to be Alison's dead father (she never knew her actual parents), the girls discover that Alison is in danger. The spirit then possesses one of the girls and warns her not to return home for her 19th birthday. The girl is immediately killed after a bookcase collapses onto her.
Output:
What took Alison's friend's life?