Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) Iraqi forces have taken another step toward wresting Mosul from ISIS. Security forces launched a large-scale military operation Saturday to take the remaining neighborhoods under ISIS control in western Mosul, the country's Joint Operation Command said. Soldiers are storming the Shifa neighborhood and al Jamhouri Hospital. Iraqi counterterrorism forces are advancing on the al Saha al Awla neighborhood, the command said. Advancing toward the Old City Police, counterterrorism and army units started storming the al-Zanjili district and headed toward the Old City, said federal police head, Lt. Gen. Ra'ed Shaker Jawdat. The Old City is also still controlled by ISIS, and authorities hope to close in on that neighborhood with their new offensive, police said. The area will pose a challenge because of its narrow streets and ISIS' use of residents as human shields.Iraq kicks off effort to take remaining Mosul neighborhoodsResidents are fleeing western Mosul amid the fighting 
 Question:He also expressed deep concern for the safety of civilians behind ISIS lines in western _.
Output:
Mosul