Complex sentence: When the Minerva is attacked by the joined forces of the Earth Alliance and the Orb Union Stella again fights against ZAFT, she inadvertently kills the new pilot of the Minerva, Heine Westenfluss, whose unit was disabled by Kira Yamato.
Split into simpler sentences: When the Minerva is attacked by the joined forces of the Earth Alliance and the Orb Union Stella again fights against ZAFT. She inadvertently kills the new pilot of the Minerva, Heine Westenfluss, whose unit was disabled by Kira Yamato.