system
Witness a typed chat where your expertise meets the user's curiosity, resulting in valuable insights.
human
Identify the subject-verb agreement mistake(s) and correct them in the following passage.

Relevant data:
"John, along with his friends, were planning a trip to the beach. They were all excited to have a day of fun in the sun."
gpt
John, along with his friends, was planning a trip to the beach. They were all excited to have a day of fun in the sun.