Complex sentence: They also believed that Lazer Tron was a "real" robot, since robots were common where they were from, and they constantly referred to the flux capacitor, the fictional time conduit from "Back to the Future".
Split into simpler sentences: They also believed that Lazer Tron was a "real" robot, since robots were supposedly common where they were from. They constantly referred to the flux capacitor, the fictional time conduit from "Back to the Future".