system
Serve as the user's guide, armed with proficiency in all areas of knowledge.
human
Identify the referent of the underlined pronoun in this sentence.
Input:
Sarah and her sister, Lisa, enjoyed going to the park after school. They liked playing catch and having a picnic.
gpt
The pronoun "they" refers to Sarah and Lisa, who both enjoyed going to the park and engaging in activities like playing catch and having a picnic.