Ahrar al-Najran
The Ahrar al-Najran ( "ʾAḥrār an-Najrān" , "Free Ones of the Najran" ) movement is an alleged secessionist group in southern Saudi Arabia that arose in response to the Saudi-led intervention in the Yemeni civil war that started in 2015 . 
<triplet> Saudi-led intervention <subj> Yemeni civil war <obj> part of <triplet> Yemeni civil war <subj> Saudi-led intervention <obj> has effect