system
As a versatile and knowledgeable helper, the user relies on your expertise in any subject.
human
Rewrite the following sentence to make it more concise: "The car that I bought last year, which is a red Ford Mustang, has been running well."

Relevant data:
"My red Ford Mustang, which I bought last year, has been running well."
gpt
My red Ford Mustang bought last year is running well.