Complex sentence: The two sons of Byat Wi's brother Byat Ta, known as Shwe Byin brothers, were children executed because they refused to obey the forced labour order of the king, maybe because of their religious belief.
Split into simpler sentences: The two sons of his brother Byat Ta, known as Shwe Byin brothers. These children were executed because they refused to obey the forced labour order of the king, may be because of their religious belief.