Definition: 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) Conditions in the embattled rebel-held eastern part of Aleppo are getting worse each day. There's no way in or out. Residents in the city are increasingly desperate to tell the world what's happening -- and many have turned to WhatsApp. "The situation here in Aleppo is very serious. It feels like you might die in any minute," Modar Shekho, a 28-year-old nurse working in the besieged city, tells CNN via the messaging app. More than 200 airstrikes bombarded the city over the weekend leaving over 100 civilians dead, with hundreds more injured, according to Ammar al-Selmo, the head of the Syria Civil Defense group, a volunteer emergency medical service.Rebel-held Aleppo facing increasing airstrikes following ceasefireCivilians share photos, videos, messages of everyday reality via WhatsAppMessages have become increasingly desperate 
 Question:In the days following the collapse of the ceasefire, messages in the _ group appear to be getting more desperate, more urgent.

WhatsApp