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: In his final appearance at the despatch box for prime minister's questions, David Cameron said Northern Ireland is stronger now than when he came to power six years ago.

David Cameron: Departed prime minister's role in Northern Ireland politics