Complex sentence: Offering to make it easier for Tinker Bell to kill her, Regina pulls out her darkened heart and gives it to Tinker Bell, who angrily demands to know why Regina lied to her.
Split into simpler sentences: Offering to make it easier for Tinkerbell to kill her, Regina pulls out her darkened heart and gives it to Tinkerbell. Tinkerbell angrily demands to know why Regina lied to her.