Fill in the blank (_) in the following sentence from the following choices.
Sentence: William was having a good run of luck gambling but Robert was having a run of bad luck. _ took a big pile of chips to cash out.

Choice 1: William was having a good run of luck gambling but Robert was having a run of bad luck. William took a big pile of chips to cash out.
Choice 2: William was having a good run of luck gambling but Robert was having a run of bad luck. Robert took a big pile of chips to cash out.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.