Bulgaria	bulgar	0.1374
NATO	nat	0.1374
territory	territ	0.1374
Sofia	sof	0.1374
troops	troop	0.1374
Bulgarian president	bulgar presid	0.1374
military bases	milit ba	0.1374
agreement	agr	0.0497
sign	sign	0.0497
take	tak	0.0497
part	part	0.0081
alliance	al	0.0081