Complex sentence: Sheridan and the Narn pilot manage to escape the Streib warship just after the "Agamemnon" and a squadron of fighters led by Commander Ivanova jump out of hyperspace and attack; the Streib vessel dumps the rest of its captives into space and is subsequently destroyed.
Split into simpler sentences: Sheridan and the Narn pilot manage to escape the Streib warship whilst the "Agamemnon" and a squadron of fighters attack. The Streib vessel dumps the rest of its captives into space and is subsequently destroyed.