Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Elon Musk has lashed out on Twitter after billionaire Bill Gates praised Tesla in an interview - but admitted he had chosen a Porsche as his first electric car.

Tesla's Elon Musk swipes at Porsche-buying Bill Gates