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: Early on Christmas Day in 1916, a group of soldiers knelt on a rough floor in a candlelit barn in France to receive Holy Communion from their chaplain. The man tending to their spiritual needs was Samuel Leighton Green. He had swapped a quiet life as a Norwich curate to share in the physical and mental suffering of those on the World War One front line. Why?

'For liberty and righteousness': A chaplain at war