Definition: In this task you are given a short story and a question regarding that story. You must answer the question based on the events of the story. Try to use the same words in the story to answer each question. You should completely answer the question in a short answer. Do not include information that is unnecessary to answer the question.
Input: Lucius decided to give his mother a ride home on his motorcycle. His mother was top heavy, and so she fell off. Lucius called an ambulance. His mother had broken her wrist, but was otherwise fine. Lucius bought a sidecar in case his mother decided to ride again.
Why did Lucius call an ambulance?
Output:
his mother fell of his motorcycle.