Complex sentence: Turkish artillery strikes killed over 54 ISIL militants on April 2016, whilst 5 people were killed and 22 others were wounded by ISIL rocket projectiles hitting the border province of Kilis.
Split into simpler sentences: Turkish artillery strikes killed over 54 ISIL militants on April 2016. Whilst 5 people were killed and 22 others were wounded by ISIL rocket projectiles hitting the border province of Kilis.