Question: what team did 1991-92 A.C. Fiorentina's german starlet last manage?

Context paragraphs:
Stefan Effenberg: Stefan Effenberg (] ; born 2 August 1968) is a retired German footballer who last managed SC Paderborn.  A midfielder, he possessed leadership skills, fantastic passing range, powerful shooting ability, physical strength, but also a fearsome and controversial character.

2002–03 Florentia Viola season: Florentia Viola was the newly founded club that replaced bankrupt "A.C. Fiorentina" in the Italian domestic league system.  Playing at Stadio Artemio Franchi in Florence, Florentia retained the support Fiorentina had had, and set Serie C2 spectator records due to the interest from fans accustomed to see Gabriel Batistuta, Rui Costa and a team challenging Italy's top clubs.

P.G. Libertas: Palestra Ginnastica Libertas, also known as P.G. Libertas, was an Italian association football club from Florence founded in 1912.  The club is short-lived, lasting little more than a decade before merging with fellow Florence club C.S. Firenze in 1926 to form A.C. Fiorentina, which would be one of Serie A's most dominant forces to this day.

1987–88 A.C. Fiorentina season: A.C. Fiorentina had its first season under Swedish coach Sven-Göran Eriksson, posting a stable mid-table season.  Eriksson's compatriot Glenn Hysén arrived from UEFA Cup champions IFK Göteborg, the centre half becoming a crucial player for La Viola.  Starlet Roberto Baggio finally got his breakthrough, scoring six league goals.

Massimo Ambrosini: Massimo Ambrosini (born 29 May 1977 in Pesaro, Marche) is a former Italian professional footballer, who mainly played as a defensive midfielder.  At club level, he is mostly known for his successful time at Italian team A.C. Milan, where he spent eighteen years of his career, winning several titles, and even captained the side from 2009 to 2013, following the retirement of Paolo Maldini.  Ambrosini retired from professional football in 2014, after a season with Fiorentina.  At international level, he represented Italy at the 2000 Summer Olympics, and in two UEFA European Championships, winning a runners-up medal at UEFA Euro 2000.

1992 Supercoppa Italiana: The 1992 Supercoppa Italiana was a match played by the 1991–92 Serie A winners Milan and 1991–92 Coppa Italia winners Parma.  It took place on 30 August 1992 at the San Siro in Milan, Italy.  A.C. Milan won the match 2–1 to earn their second Supercoppa.

Danilo Stefani: Danilo Stefani (born 19 January 1979) is an Italian footballer who played as a midfielder.  After playing two matches with A.C. Fiorentina in Serie A he continued his career with various teams in Serie C2 and from 2007 played in Serie D, Eccellenza and Promozione, the divisions of amateur (and semi-pro) Lega Nazionale Dilettanti of Italy.

1988–89 A.C. Fiorentina season: A.C. Fiorentina finished in the midfield of Serie A, beating Roma 1-0 in a playoff match due to a goal by ex-Roma player Roberto Pruzzo.  The season also marked the international breakthrough of Roberto Baggio, the striker scoring 15 league goals, also setting up several of Stefano Borgonovo's 14.

1991–92 A.C. Fiorentina season: Associazione Calcio Fiorentina failed to take off under former Brazilian national team coach Sebastião Lazaroni, and ended the season in 12th place.  The result prompted president Cecchi Gori to sign German starlet Stefan Effenberg among others for the coming season, also replacing Lazaroni with Luigi Radice.  The most significant event in Fiorentina's season was the arrival of Argentinian striker Gabriel Batistuta, who was to become Fiorentina's all-time topscorer during his nine years at the club.

1968–69 Serie A: The 1968–69 Serie A season was won by A.C. Fiorentina.

Supporting paragraphs: 1991–92 A.C. Fiorentina season Stefan Effenberg
Answer: SC Paderborn