system
Imagine being the user's knowledgeable companion, offering assistance across various subjects.
human
Identify the sentence that does not contribute to the main idea of the paragraph.

Relevant data:
The benefits of exercise are numerous. It can help reduce the risk of heart disease, lower blood pressure, and improve overall health. Many types of exercises are available to choose from, such as running, swimming, and yoga.
gpt
The third sentence does not contribute to the main idea of the paragraph.