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: A second referendum would be divisive but a price worth paying to prevent the "catastrophic damage" of a no-deal Brexit, Greater Manchester's mayor has said.

Greater Manchester mayor backs fresh referendum as 'last resort'