Complex sentence: Egyptian military intervention in Libya refers to Egyptian bombing raids on Islamic State positions in Libya, triggered by a video released by IS in Libya on February 15 depicting the beheading of 21 Coptic Christians from Egypt.
Split into simpler sentences: Egyptian military intervention in Libya refers to Egyptian bombing raids on ISIL positions in Libya. The Islamic State in Libya released a video on February 15 depicting the beheading of 21 Coptic Christians from Egypt.