Complex sentence: On the 19th of July 2016, al-Zenki fighters recorded themselves beheading a Palestinian child between the age of 10-13, they claimed he was fighting for the Syrian government in Aleppo with Liwa al-Quds.
Split into simpler sentences: On the 19th July 2016, al-Zenki fighters recorded themselves beheading a Palestinian child aged between 10-13. They claimed he had been fighting for the Syrian government in Aleppo with Liwa al-Quds.