id	keyword
gc-644	fracture
gc-644	area
gc-644	karst
gc-644	system
gc-644	caves
gc-644	modelling
gc-644	vízfő
gc-644	water
gc-644	type
gc-644	spring
gc-644	porosity
gc-644	distribution
gc-644	geometry
gc-644	network
gc-644	flow
gc-644	mecsek
gc-644	croatica
gc-644	data