Task: Question Generation
Input (English): A fervent follower of the absolutist cause, Elío had played an important role in the repression of the supporters of the Constitution of 1812. For this, he was arrested in 1820 and executed in 1822 by garroting. Conflict between absolutists and liberals continued, and in the period of conservative rule called the Ominous Decade (1823–1833), which followed the Trienio Liberal, there was ruthless repression by government forces and the Catholic Inquisition. The last victim of the Inquisition was Gaietà Ripoli, a teacher accused of being a deist and a Mason who was hanged in Valencia in 1824.
Output (English): What are the years from 1823-1833 called?