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 mine manager has pleaded not guilty to manslaughter over the deaths of four miners at a Swansea Valley colliery.

Gleision mine deaths: Manager Malcolm Fyfield pleads not guilty to manslaughter