Complex sentence: Debarwa was formerly the capital of an ancient Kingdom named "Medri Bahri" which roughly translates as "sealand", and was ruled by the Bahr negus ("King of the sea").
Split into simpler sentences: Debarwa was formerly the capital of an ancient Kingdom named Medri Bahri, which roughly translates as "Sealand". It was ruled by the Bahr negus ("King of the sea").