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sofia × 14bulgaria × 9
buses × 3
istanbul × 3
trains × 2
airports × 2
night-transport × 2
balkans × 2
transit × 1
luggage × 1
public-transport × 1
budget × 1
online-resources × 1
cellphones × 1
transportation × 1
automobiles × 1
turkey × 1
security × 1
factoids × 1
routes × 1
luggage-storage × 1
museums × 1
wifi × 1
rome × 1
history × 1