Complex sentence: Rajesh, who is normally called Raj or by his surname Koothrappali by Sheldon Cooper, is from New Delhi, India, yet despises Indian food, and his knowledge regarding Indian culture and Hinduism is disputed by Sheldon Cooper.
Split into simpler sentences: Rajesh, who is normally called Raj or by his surname Koothrappali by Sheldon Cooper, is from New Delhi, India. However, he despises Indian food, and his knowledge regarding Indian culture and Hinduism is often disputed by Sheldon Cooper.