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: Maltese Prime Minister Joseph Muscat has announced he will resign in the new year amid street protests over the investigation into the murder of a journalist in 2017.

Daphne Caruana Galizia: The key figures in Malta's crisis over her murder