Complex sentence: The T-1000, also known as a Prototype Series 1000 Terminator, is a fictional character and shapeshifting android assassin that appears as the main antagonist of', as well as a supporting antagonist in' and "Terminator Genisys".
Split into simpler sentences: The T-1000, also known as a Prototype Series 1000 Terminator, is a fictional character in the Terminator franchise. A shapeshifting android assassin, the T-1000 is the main antagonist of', as well as a supporting antagonist in' and "Terminator Genisys".