Fill in the blank (_) in the following sentence from the following choices.
Sentence: The architect wanted to put the windows on the walls but the _ were too large.

Choice 1: The architect wanted to put the windows on the walls but the walls were too large.
Choice 2: The architect wanted to put the windows on the walls but the windows were too large.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.