Fill in the blank (_) in the following sentence from the following choices.
Sentence: William thinks Nick is a very good writer and _ is proud to have their book signed.

Choice 1: William thinks Nick is a very good writer and William is proud to have their book signed.
Choice 2: William thinks Nick is a very good writer and Nick is proud to have their book signed.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.