Complex sentence: The Swedish girls are being held hostage in cages by Iris who arrives and prepares a foul drink to purify their blood however is interrupted by Sally who asks one of the girls to entertain her but sets her free.
Split into simpler sentences: The Swedish girls are being held hostage in cages by Iris, who arrives and prepares a foul drink to purify their blood. However, she is interrupted by Sally, who asks one of the girls to entertain her and sets her free.