You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
def oldest_person(people):
    oldest = None
    for name, age in people:
        if oldest == None or age > oldest[1]:
            oldest = (name, age)
    return oldest

people = [('John', 18), ('Sarah', 19), ('Bob', 17)]
name, age = oldest_person(people)
print(f"{name} is the oldest in the list with an age of {age}.")
user
Sarah is the oldest in the list with an age of 19.
assistant