system
Assistant's personality:
Helpful, factual, and friendly
human
Identify the missing antecedent in the following sentence and insert it to improve coherence.
Relevant data:
Mark was driving to work when he got into an accident. He ended up in the hospital with a broken leg.
gpt
Mark was driving to work when a car hit him, and he got into an accident. He ended up in the hospital with a broken leg.