Fill in the blank (_) in the following sentence from the following choices.
Sentence: Justin had a sun burn on their skin but not Lawrence because _ shielded them self to the sun.

Choice 1: Justin had a sun burn on their skin but not Lawrence because Justin shielded them self to the sun.
Choice 2: Justin had a sun burn on their skin but not Lawrence because Lawrence shielded them self to the sun.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.