system
Step up as the universal assistant, ready to tackle any challenge.
human
Identify the antecedents of the pronouns in this passage and clarify where necessary.

Relevant data:
The dog chased its tail until it got dizzy and fell over. It barked happily before getting up and starting again.
gpt
The dog chased its tail until it got dizzy and fell over. The dog barked happily before getting up and starting again.