Complex sentence: Thousands of protesters gathered in Myitkyina on 20 December 2013 to protest the forcible recruitment of ethnic Shan people for the KIA, which reportedly recruited about 100 Taileng insurgents from Mansi Township in late 2013.
Split into simpler sentences: Thousands of protesters gathered in Myitkyina on 20 December 2013 to demonstrate against the forcible recruitment of ethnic Shan people into the KIA. The KIA has allegedly recruited about 100 Taileng insurgents from Mansi Township in late 2013.