Complex sentence: The first known mention of the Moravians was in the Annales Regni Francorum in 822 AD, and the tribe was located by the Bavarian Geographer between the tribe of the Bohemians and the tribe of the Bulgarians.
Split into simpler sentences: The first known mention of the Moravians was in the Annales Regni Francorum in 822 AD. The tribe was located by the Bavarian Geographer between the tribe of the Bohemians and the tribe of the Bulgarians.