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: Billionaire Tom Steyer has announced a 2020 presidential campaign, adding his name to a crowded pool of Democrats vying to unseat President Donald Trump.

Billionaire activist Tom Steyer enters Democratic presidential race