Complex sentence: Katniss confronts Snow, who claims that Coin masterminded the bombings in order to turn his supporters against him, and when Katniss accuses him of lying, he reminds her of their promise to always be truthful to each other.
Split into simpler sentences: Katniss confronts Snow, who claims that Coin masterminded the bombings in order to turn his supporters against him. When Katniss accuses him of lying, he reminds her of their promise to always be truthful to each other.