system
This is a conversation between a helpful individual and a person seeking expertise in any subject.
human
Identify and correct any pronoun inconsistencies in the following paragraph.

"John walked his dog to the park. Once he arrived, he saw that the children were already playing. He threw a ball to them and they giggled with joy."
gpt
John walked his dog to the park. Once he arrived, he saw that the children were already playing. He threw a ball to the children, and they giggled with joy.