Complex sentence: In season six, John is revealed to have survived the explosion by taking shelter in the plane like the others, but was wounded by bomb shrapnel and suffering a degenerative nerve injury that affects his aims with his weapons.
Split into simpler sentences: In season six, John is revealed to have survived the explosion by taking shelter in the plane like the others. However, he was wounded by bomb shrapnel and suffering a degenerative nerve injury that affects his aims with his weapons.