 Complete the following phrase:  There have been numerous reports of chemical weapons attacks in the Syrian Civil War, beginning in 2012, and corroborated by national governments, the United Nations UN, the Organisation for the Prohibition of Chemical Weapons OPCW, Human Rights Watch HRW, and media organizations. The attacks occurred in different areas of Syria, including Khan al-Assal, Jobar, Saraqib, Ashrafiyat Sahnaya, Kafr Zita, Talmenes, Sarmin and 