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.

"MISSING: A BIG IDEA. LOST BY LABOUR PARTY. IF FOUND PLEASE INFORM PARTY BEFORE SEPTEMBER. REWARD - POWER (MAYBE)"
Labour leadership: Missing - a big idea