Complex sentence: However, after being enslaved for more than 50 years, the robots became self-aware and formed the Society of Machines, Androids, and Cyborgs, or the SMAC, which petitioned for equal rights in human society.
Split into simpler sentences: However, after being enslaved for more than fifty years, the Robots eventually became self-aware. Once that happened, the Robots formed the Society of Machines, Androids, and Cyborgs, or the SMAC, which petitioned for equal rights in human society.