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: Teen activist Greta Thunberg has lashed out at French lawmakers for mocking her in a speech to parliament that was boycotted by far-right politicians.

Greta Thunberg speech: French MPs boycott teen ‘apocalypse guru’