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: Tech bosses Mark Zuckerberg, Sundar Pichai and Jack Dorsey are being grilled by US politicians over the proliferation of disinformation on YouTube, Twitter and Facebook.

Google, Facebook Twitter grilled in US on fake news