dialogue: W: Good evening, everyone. Tonight, we will meet an honored guest, Mr. Philip Brown. M: Hello, everyone. I'm the founder of the website Student Experience. I'm glad to meet all of you today. W: Well, Mr. Brown, what made you decide to set up a website mainly for students? M: To be exact, our website attracts not only students, but also teachers and families. W: Right. When did you start the website? M: In 2010. W: How did Student Experience begin? M: When Student Experience was founded, I was sharing an apartment with my sister Daisy. W: You two decided to set up the website together? M: Not really. She had been in a car accident around that time, and she needed some assistance with her daily activities. It took her two years before she could live independently again. W: That is why you had the thought to start the website? M: Exactly. Many other people with disabilities have the same need for assistance. So people with this need can come to the website. And this gives good opportunities for students who want part-time jobs and pocket money at the same time.
question: What happened to the man's sister?
choice: She got a disease. She had a car accident. She was in prison for two years.
answer: She had a car accident.