Complex sentence: Jews started to migrate to Upper Hungary (mostly the territory of today's Slovakia) from Bohemia, Austria and Germany in the 11th century and the first Jewish community in Bratislava was founded in the late 13th century.
Split into simpler sentences: Jews started to migrate to Upper Hungary (mostly the territory of today's Slovakia) from the areas of Bohemia, Austria and Germany in the 11th century. The first Jewish community in Bratislava was founded in the late 13th century.