Task: Question Answering
Input (English): Passage: In 1979 a priest at the Vatican sees a comet arching over the moon (described as the "eye of God"), heralding the birth of one chosen to be the mother of Satan's child. The priest is sent on a mission by the Pope  to find and protect the girl from Satan, although a few Vatican knights (led by a corrupt cardinal) insist that she must die. In New York a newborn girl, Christine York, is identified by Satanists (including her physician, Dr. Abel, and her nurse and future guardian, Mabel) as the person chosen to bear Satan's child on New Year's Eve, 1999. The Satanists perform occult rites on the newborn.
In late 1999, Satan possesses an investment banker in a restaurant; he then destroys the restaurant, killing many inside. Suicidal and alcoholic former police detective Jericho Cane, depressed since his wife and daughter's contract killings, works for a private security company and blames God for his plight. Jericho and co-worker Bobby Chicago are assigned to protect the possessed banker. A priest, Thomas Aquinas, unsuccessfully tries to kill the banker. Jericho captures Aquinas, who tells Jericho: "The thousand years has ended, the dark angel is loosed from his prison" and says that a girl is central. Jericho shoots Aquinas, who is arrested by the New York Police Department. Marge Francis, an NYPD detective and Jericho's former colleague, tells him that Aquinas has no tongue. 
Question: What is the name of the dark angel that has been loosed from his prison?
Output (English): Satan.