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: Barack Obama has used his first high-profile speech since stepping down as US president to take swipes at "strongman politics" and politicians' disregard for the facts.

Mandela lecture: Five things Barack Obama said