id	keyword
grbs-15917	herodotus
grbs-15917	greek
grbs-15917	persian
grbs-15917	world
grbs-15917	space
grbs-15917	map
grbs-15917	maps
grbs-15917	oikoumenē
grbs-15917	geography
grbs-15917	studies
grbs-15917	asia
grbs-15917	empire
grbs-15917	europe
grbs-15917	mediterranean
grbs-15917	greece