Complex sentence: The Hattian pantheon of gods included a storm-god, sun-goddess and a number of other elemental gods, later on the Hittites subsumed much the Hattian pantheon into their own religious beliefs.
Split into simpler sentences: The Hattian pantheon of gods included a storm-god, a sun-goddess and a number of other elemental gods. Later on the Hittites subsumed much the Hattian pantheon into their own religious beliefs.