Complex sentence: The Siege of Shaizar took place from April 28 to May 21,1138, resulting in the Emir of Shaizar paying an indemnity and becoming the vassal of the Byzantine emperor.
Split into simpler sentences: The Siege of Shaizar took place from April 28 to May 21,1138. The siege resulted in the Emir of Shaizar paying an indemnity and becoming the vassal of the Byzantine emperor.