Question: Facts: - title: duke -lrb- dux -rrb- -lsb- of lower pannonia -rsb- - reign: 829 -- 838 - more: no - occupation: bulgar vassal Based on these bullet points, write a short biography describing the life of ratimir , duke of lower pannonia .
Answer:
ratimir or ratimar -lrb- -rrb- was a slavic prince that ruled the duchy of lower pannonia as a bulgar vassal between ca. 829 to 838 .