Complex sentence: Eventually, Trotsky's friends found Martin and Vsevolod, and Vsevolod was sent to Coyoacán, Mexico to live with Trotsky and Natalia Sedova on 8 August 1939, where Trotsky had been living in exile since January 1937.
Split into simpler sentences: Eventually, Trotsky's friends found Martin and Vsevolod, and Vsevolod was sent to Coyoacán, Mexico to live with Trotsky and Natalia Sedova. Vsevolod arrived in Mexico on 8 August 1939, where Trotsky had been living in exile since January 1937.