Fill in the blank (_) in the following sentence from the following choices.
Sentence: Lawrence needed help from Ian in filing a tenant right's violation because _ forgot how.

Choice 1: Lawrence needed help from Ian in filing a tenant right's violation because Lawrence forgot how.
Choice 2: Lawrence needed help from Ian in filing a tenant right's violation because Ian forgot how.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.