Task: Question Answering
Input (English): Passage: I was driving along the highway when I saw that up ahead , two cars got into an accident . I pulled over to the side of the road so that I could use my phone . When I was safely out of the way , I picked up my phone and dialed 911 . They also told me to stay on the line so that they could determine my exact location . Since I was not part of the accident , I did not have all of the information , but I told them that the accident looked bad and they might need an ambulance . After I gave them all of the information , I waited for police and an ambulance to arrive . This took about 10 minutes . After that , the paramedics in the ambulance helped the people who had been in the accident , and the police helped to clear the road so that cars could pass again . Question: When did they explain to the person on the other line what had happened? Option1: When the person answered Option2: before calling 911
Output (English): When the person answered