Complex sentence: The following day, a sailors' council took control of the base, and a train carrying the mutineers from "Helgoland" and "Thüringen" was stopped in Cuxhaven, where the men escaped.
Split into simpler sentences: The following day, a sailors' council took control of the base. That same day, a train carrying the mutineers from "Helgoland" and "Thüringen" was stopped in Cuxhaven, where the men escaped.