Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: DUBLIN (Reuters) - Irish student  Ibrahim Halawa  was greeted by cheering crowds at Dublin Airport on Tuesday as  he  arrived home following  his  acquittal last month in a four-year mass trial.
 Irish citizen Ibrahim Halawa  arrives at Dublin Airport in Ireland  October 24  2017. REUTERS/Clodagh Kilcoyne
 Halawa  who was born and raised in Dublin and is a son of the most senior Muslim cleric in Ireland   was 17 when  he  was arrested along with hundreds of others in 2013 as part of a crackdown on protests in Egypt.
The defendants had all faced the death penalty and though none received it  hundreds were given hefty jail sentences.  Halawa ’s sisters were released shortly after their arrests.
 Halawa  has said  he  was regularly tortured during  his  period in detention. The Egyptian authorities have repeatedly denied allegations of abuses from rights groups.

Ireland welcomes home student who spent four years in an Egyptian jail