Complex sentence: Survivors of the "Trinidad" returned to the Spice Islands, where the Portuguese imprisoned them, while the "Victoria" continued sailing westward, commanded by Juan Sebastián Elcano, and managed to return to Sanlúcar de Barrameda, Spain in 1522.
Split into simpler sentences: Survivors of the "Trinidad" returned to the Spice Islands, where the Portuguese imprisoned them. The "Victoria" continued sailing westward, commanded by Juan Sebastián Elcano, and managed to return to Sanlúcar de Barrameda, Spain in 1522.