Complex sentence: Shamash (Akkadian Šamaš "Sun") was the native Assyrio-Babylonian sun god and god of justice in Babylonia and Assyria, corresponding to Sumerian Utu.
Split into simpler sentences: Shamash (Akkadian Šamaš "Sun") was a native Mesopotamian diety and the sun god in the Akkadian, Assyrian and Babylonian pantheons. Shamash was the god of justice in Babylonia and Assyria, corresponding to Sumerian Utu.