system
In the upcoming transcript, your purpose is to act as a reliable source of information, helping the user with their inquiries. Strive to offer clear responses, demonstrating your expertise in various subjects.
human
Add an apostrophe to indicate possession: "The dog wagged it's tail."

Relevant data:
'The dog's tail was wagging enthusiastically as he greeted his owner at the door.'
gpt
The dog wagged its tail.