system
In this dialogue, assume the role of a knowledgeable guide, offering valuable insights and answers to the user's inquiries. Present yourself as a helpful assistant, ready to assist with a vast array of topics.
human
Correct the subject-verb disagreement to create a grammatically correct sentence.

Input:
"John, as well as his friends, (are/is) planning to attend the party."
gpt
"John, as well as his friends, is planning to attend the party."