Question: Who played stefano on days of our lives?

Disambiguated questions and answers:
context: No context provided
question: Who played Stefano on Days of Our Lives from 1982-1988 and 1993-2016?
short_answers: Joseph Mascolo
context: In the early 1980s, then head writer, Pat Falken Smith created the role specifically for Mascolo after seeing his performance as real-life crime boss, Salvatore Maranzano on the NBC miniseries, "The Gangster Chronicles" in 1981. Mascolo first appeared as Stefano on January 18, 1982. He departed from the series on March 8, 1983, and returned a year later on March 2, 1984 before briefly departing on May 11, 1984 only to return on October 19 and depart again on February 22, 1985. Mascolo briefly returned to the series from November 4 to December 19, 1988. Actor Frank Fata appeared in the role of Stefano for two episodes which aired on December 3 and 4, 1991.<ref name="Mascolo Exit/Recast"></ref> Mascolo reclaimed the role on a contractual basis on September 17, 1993. He departed from the show on December 24, 1996, and re-appeared for a few episodes from February 7 to 13, 1997. Mascolo returned to the show full-time once again on June 13, 1997.
question: Who played Stefano on Days of Our Lives in 1991?
short_answers: Frank Fata
wikipage: Stefano DiMera
context: No context provided
question: Who played Stefano on Days of Our Lives in 2007?
short_answers: Davide Shiavone
context: No context provided
question: Who played Stefano on Days of Our Lives from 2019-present?
short_answers: Stephen Nichols

Long-form answers:
knowledge: content: Stefano DiMera is a fictional character from the NBC soap opera Days of Our Lives, played by Joseph Mascolo. Created by Pat Falken Smith, Stefano was introduced on January 18, 1982 as the father of Tony DiMera (Thaao Penghlis) looking to expand his criminal empire to Salem. 
wikipage: Stefano DiMera
content: Joseph Peter Mascolo (March 13, 1929 – December 8, 2016) was an American musician and dramatic actor.
wikipage: Joseph Mascolo
content: Actor Frank Fata appeared in the role of Stefano for two episodes which aired on December 3 and 4, 1991.
wikipage: Stefano DiMera
content: In 2019, "Stefano" (Stephen Nichols) returned to Salem, with the assistance of "Princess Gina" and Dr. Rolf. Rolf explains that Stefano is in fact dead, the victim of Hope Brady's bullet. However, before he died, Rolf transferred Stefano's "essence" - his memories, beliefs, and personality traits - into a computer chip which he has since implanted in Steve Johnson's neck, effectively turning Steve into "the new Stefano" (much as he also did with "Gina's essence" and Hope). Rolf did this to get revenge on the enemies of "the great Stefano" and return Salem to his reign of terror.
wikipage: Stefano DiMera
content: Having angered many of his enemies, Stefano is shot and presumably killed in early June 2012. 
wikipage: Stefano DiMera
long_answer: Stefano DiMera is a fictional character from the NBC soap opera Days of Our Lives, who was introduced on January 18, 1982 as the father of Tony DiMera, looking to expand his criminal empire to Salem. American musician and dramatic actor Joseph Mascolo played the character of Stephano from 1982-1988 and 1993-2016. Actor Frank Fata appeared in the role of Stefano for two episodes which aired on December 3 and 4, 1991 and Davide Shiavone played the role in 2007. Although the character was shot and killed in 2012, in 2019, "Stefano" returned to Salem, with the assistance of "Princess Gina" and Dr. Rolf, who transferred Stefano's "essence" - his memories, beliefs, and personality traits - into a computer chip which he has since implanted in character Steve Johnson's neck, effectively turning Steve into "the new Stefano," who has been played by Stephen Nichols from 2019-present.