paragraph_text: Von Neumann introduced the study of rings of operators, through the von Neumann algebras. A von Neumann algebra is a *-algebra of bounded operators on a Hilbert space that is closed in the weak operator topology and contains the identity operator. The von Neumann bicommutant theorem shows that the analytic definition is equivalent to a purely algebraic definition as an algebra of symmetries. The direct integral was introduced in 1949 by John von Neumann. One of von Neumann's analyses was to reduce the classification of von Neumann algebras on separable Hilbert spaces to the classification of factors.

paragraph_text: Johannes von Lahnstein is a fictional character on the German soap opera "Verbotene Liebe (Forbidden Love)". The character was portrayed by actor Thomas Gumpert from 23 September 2003 to 9 January 2008.

paragraph_text: Unbehagen is the second studio album by Nina Hagen Band released in 1979 by CBS Records. It is the last album released by the band, before Nina Hagen decided to pursue a solo career. The band kept on performing under the name Spliff.

paragraph_text: Tanja von Lahnstein (née Wittkamp, formerly von Anstetten, Rai and von Lahnstein) is a fictional character from the German soap opera "Verbotene Liebe (Forbidden Love)", played by actress Miriam Lahnstein. She made her first appearance on-screen on 21 June 1995 and left after three years in May 1998. Lahnstein returned to the role in 2001, where she was seen from 24 April to 5 October. She came back another three years later and reappeared on 16 April 2004. Lahnstein left the show for a short time, while being on contract, from June 2005 to March 2006 and from March to December 2007 during the pregnancy of her two children. She left again in December 2009 and returned in April 2010.

paragraph_text: Sarah von Lahnstein (née Käppler, formerly Hofmann) is a fictional character on German soap opera "Verbotene Liebe (Forbidden Love)". The character was portrayed by actress Sina-Valeska Jung from 11 July 2006 to 5 May 2009.

paragraph_text: Maria di Balbi is a fictional character on the German soap opera "Verbotene Liebe (Forbidden Love)" portrayed by actress Simone Ritscher since 21 January 2009. The character was also known by the alias Maria Galdi and the identity of her late sister Francesca von Lahnstein. She left the series on 7 January 2011. Two months later, on 17 March 2011, the character was killed off off-screen, to the anger of many fans.

paragraph_text: Jana von Lahnstein ("née" Brandner) is a fictional character in the German soap opera "Verbotene Liebe" ("Forbidden Love"). The character was played by the actress Friederike Sipp from 1 October 2002 to 21 March 2005. The character was recast with Vanessa Jung, who played the role from 23 March 2005 to 20 February 2008.

paragraph_text: The Lahnstein family is a very wealthy and aristocratic prestigious fictional family on the German soap opera "Verbotene Liebe (Forbidden Love)". The Lahnsteins have been a staple on "Verbotene Liebe" since their introduction in September 2003.

paragraph_text: Constantin von Lahnstein is a fictional character on German soap opera "Verbotene Liebe (Forbidden Love)" and was portrayed by actor Milan Marcus. He made his first appearance on 9 December 2004. The character was introduced as the last original member of the Lahnstein family as a troublesome teenager that grow up at his aunt's in Italy after his mother died. He has been featured in numerous storylines, including finding his biological father, his friendship to Paul Brandner, his relationships to Paul's sister Lisa and Judith Hagendorf and an affair with the former wife of his cousin, Nathalie Käppler. Marcus decided to focus on college in 2008 but stayed with the show until his last appearance on 5 January 2011.

paragraph_text: Nathalie Brandner (née Käppler, formerly von Lahnstein) is a fictional character from the German soap opera "Verbotene Liebe (Forbidden Love)". The character is portrayed by actress Jenny Winkler. She first appeared on 12 November 2004 and had her final appearance on 14 December 2010.

paragraph_text: Rebecca von Lahnstein is a character on the German soap opera "Verbotene Liebe (Forbidden Love)". The character was portrayed by Jasmin Lord and debuted on June 17, 2008. In 2009, Lord earned the "Miss Soap award" as the most beautiful actress in a soap opera, followed by the "German Soap Award" as Sexiest Woman in 2011. It was announced on January 18, 2011 that Lord is going to leave the show and finishes shooting in April 2011. She made her last on-screen appearance on July 27, 2011. After a few months the character was recast with Tatjana Kästel, who made her first on-screen appearance on February 13, 2012.

paragraph_text: Dr. Helena von Lahnstein is a fictional character of the German soap opera "Verbotene Liebe (Forbidden Love)". The character has been played by Renée Weibel since October 5, 2009.

paragraph_text: Hagen von Lahnstein is a fictional character on the German soap opera "Verbotene Liebe". The character has been played by Christoph Mory, after being introduced by Tom Viehöfer.

paragraph_text: Under the pretext of this threat of war, Hagen persuades Kriemhild, who still trusts Hagen, to mark Siegfried's single vulnerable point on his clothing with a cross under the premise of protecting him. Now knowing Siegfried's weakness, the fake campaign is called off and Hagen then uses the cross as a target on a hunting trip, killing Siegfried with a javelin as he is drinking from a brook (Chapter 16). Kriemhild becomes aware of Hagen's deed when, in Hagen's presence, the corpse of Siegfried bleeds at the site of the wound (an old Norse legend held that the corpse of a murdered person would bleed in the presence of the murderer, known as cruentation). This perfidious murder is particularly dishonorable in medieval thought, as throwing a javelin is the manner in which one might slaughter a wild beast, not a knight. We see this in other literature of the period, such as with Parsifal's unwittingly dishonorable crime of combatting and slaying knights with a javelin (transformed into a swan in Wagner's opera). Further dishonoring Siegfried, Hagen steals the hoard from Kriemhild and throws it into the Rhine (Rheingold), to prevent Kriemhild from using it to establish an army of her own.

paragraph_text: Sebastian von Lahnstein is a fictional character from the German soap opera "Verbotene Liebe (Forbidden Love)". The character was portrayed by actor Joscha Kiefer from November 26, 2007 to October 13, 2009. The part was recast with Sebastian Schlemmer who took over the role on October 19, 2009.

paragraph_text: Cosma Shiva Hagen (born May 17, 1981 in Los Angeles, California) is a German-American actress and the daughter of the German new wave/punk singer Nina Hagen and the Dutch musician Ferdinand Karmelk. Her grandmother is actress Eva-Maria Hagen, and her step-grandfather is the East German dissident writer Wolf Biermann. Eva-Maria Hagen was allowed to emigrate to West Germany during the 1970s. Shiva's unusual name was picked by her mother, who claimed she saw a UFO while pregnant. "Cosma" is a reference to Cosmos, and "Shiva" is a reference to the Hindu God Shiva.

paragraph_text: For its first three years, Make Room For Daddy garnered decent ratings, but failed to make the list of the top 30 programs. Shortly after the third season finished filming, Jean Hagen left the show over dissatisfaction with her role and frequent clashes with Danny Thomas. Thomas was upset with her for leaving, and felt the show would not last without her. However, he decided to push on. At the start of the fourth season, the series title was changed to The Danny Thomas Show. Both Thomas and producer Sheldon Leonard were faced with a serious dilemma -- how to explain Hagen's absence. To have ``Danny ''and`` Margaret'' divorce in that era would have been unacceptable to television audiences, so it was explained that Margaret suddenly had died off - screen. It was a risky move because until this time, no character on a TV situation comedy had died.

paragraph_text: "TV-Glotzer" is a song by Nina Hagen Band, first released in 1978 by CBS Records and later, on August 29, 1979 released in United Kingdom. The song is a cover of "White Punks On Dope" by The Tubes, with different German lyrics from the perspective of an East German unable to leave her country, who escapes by watching West German television, where "everything is so colorful". Hagen wrote the song before being expatriated from East Germany in 1976, following her stepfather Wolf Biermann. Later, when she formed the Nina Hagen Band in the West Berlin, they recorded the song and it became the lead single from their debut album "Nina Hagen Band" (1978).

paragraph_text: Verbotene Liebe (, lit. "Forbidden Love") is a German television soap opera created by Reg Watson for Das Erste. The show is set primarily in the German city of Düsseldorf although, at times, the city of Cologne and the Spanish island of Majorca have figured prominently in the show's story lines. First broadcast on 2 January 1995, "Verbotene Liebe" was originally broadcast in 24-minute episodes, five times a week. It expanded to 45-minute episodes on 21 June 2011 and trimmed back to 40-minute episodes on 23 January 2012 to accommodate an adjusted time-slot. In 2006, Pay-TV network Passion began broadcasting episodes of the show from the beginning.

paragraph_text: Jean Hagen as Lina Lamont. Fresh off her role in The Asphalt Jungle, Hagen read for the part for producer Arthur Freed. She did a dead - on impression of Judy Holliday's Billie Dawn character from Born Yesterday, which won her the role.

Question: Who created the show Hagen von Lahnstein is a character in?
Answer: Reg Watson