Sliven Airfield
Sliven Airfield is a military airport located near Sliven , Sliven , Bulgaria . 
<triplet> Sliven Airfield <subj> Bulgaria <obj> country <triplet> Sliven <subj> Bulgaria <obj> country <triplet> Sliven <subj> Bulgaria <obj> country <triplet> Bulgaria <subj> Sliven <obj> contains administrative territorial entity