Fill in the blank (_) in the following sentence from the following choices.
Sentence: Jill poured the entire bag of flour into the mixing bowl until the _ was empty.

Choice 1: Jill poured the entire bag of flour into the mixing bowl until the bag was empty.
Choice 2: Jill poured the entire bag of flour into the mixing bowl until the bowl was empty.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2. The sentence should state that the bowl was emptied, not the bag.