Complex sentence: Eventually, Eveline makes Mia watch a video tape to restore her memory, in which it is revealed that Mia was a covert operative working for an unnamed corporation that developed Eveline as a bioweapon.
Split into simpler sentences: Eventually, Eveline makes Mia watch a video tape to restore her memory. It is revealed that Mia was a covert operative working for an unnamed corporation that developed Eveline as a bioweapon.