Original sentence: Ashmit Patel portrayed Abu Shamil, the Chechen militant who masterminded the attack and was ringleader of the group.It is based on the attack and focuses on the background of the incident.The School Bag, a 2017 Indian short film by Dheeraj Jindal is also based on the attack
Edited sentence: Ashmit Patel portrayed Abu Shamil, the Chechen militant who masterminded the attack and was ringleader of the terrorists.It is based on the terrorist attack and focuses on the background of the incident.The School Bag, a 2017 Indian short film by Dheeraj Jindal is also based on the terrorist attack