Task: Question Answering
Input (English): Passage: The duo were disappointed with their performance, particularly Garfunkel, who felt that he sang poorly. Simon said that he did not immediately realize the magnitude of the event: "I didn't get what had happened – how big it was – until I went home, turned on the television and saw it on all the news ... and later that night on the front pages of all the newspapers. Then I got it."In May 1982, Simon & Garfunkel went on a world tour with stops in Japan, Germany, Denmark, Sweden, Switzerland, the Netherlands, Ireland, France, Great Britain, New Zealand, the US and Canada. The European leg of their tour began on May 28, 1982, at the Stadion am Bieberer Berg in Offenbach am Main. This was their first performance in Germany, and had an attendance of around 40,000 spectators.When they were not on the road, the duo went into the studio to work on what was to be a reunion Simon & Garfunkel album, tentatively entitled Think Too Much, with Garfunkel adding harmony vocals to a bunch of new songs for which Simon had already laid down some backing tracks. They set a release date of spring 1983 to coincide with their planned North American tour, but after increasingly acrimonious delays and disagreements, Simon told Warner Brothers he could no longer work with Garfunkel and that the project as an S&G album was cancelled. Thus Garfunkel dropped out of the project, which then became Simon's November 1983 solo album Hearts and Bones.Several years would pass before Simon & Garfunkel worked together again. Their next joint public appearance was in 1990, when they performed for their induction into the Rock and Roll Hall of Fame. When Simon gave another free concert in Central Park on August 15, 1991, he rejected Garfunkel's offer to participate. However, they agreed to perform together in 1993 for 21 sold out concerts in New York, with half of the show being Paul Simon solo with a band and the other half Simon and Garfunkel. Later the same year, they did some charity concerts, including the Bridge School Benefit concerts and a benefit for United Way of Canada Children's Charities at SkyDome in Toronto. Their next performance as a duo was in December 2003, at New York's Madison Square Garden during the Old Friends Tour. This concert was recorded, and released in December 2004 as the album Old Friends: Live on Stage.Simon & Garfunkel's Concert in Central Park raised around $51,000 for Central Park. Benefit concerts by other musicians followed, and helped to raise awareness of the park's state. With donations from the general public and with the help of wealthy benefactors, the park was restored during the 1980s and gained recognition as a major tourist attraction. As of 2011, donations still make up the majority of its budget. Today concerts and other benefits are regularly held on the Great Lawn. 
Question: What was the name of the concert that was recorded and released in December 2004?
Output (English): Old Friends Tour.