Allan Rodenkam Simonsen (born 15 December 1952) is a former Danish footballer and manager. He most prominently played as a forward for German Bundesliga club Borussia Monchengladbach, winning the 1975 and 1979 UEFA Cups, as well as for Barcelona from Spain, winning the 1982 Cup Winners' Cup. Simonsen is the only footballer to have scored in the European Cup, UEFA Cup, and Cup Winners' Cup finals. Simonsen was named 1977 European Footballer of the Year.

In his first two seasons with Borussia Monchengladbach, Simonsen had a hard time, as he only played a combined 17 games and scored two goals. However, he was part of the team which won the 1972-73 German Cup trophy. He broke into the starting line-up for the 1974-75 season. He played all 34 games of the season, and scored 18 goals as Monchengladbach won the Bundesliga championship. Simonsen also scored 10 goals in 12 games in the international 1974-75 UEFA Cup competition, including two goals in the 5-1 final victory against FC Twente. In the following season, Simonsen scored 16 goals as Monchengladbach regained the Bundesliga in the 1975-76 season. He scored four goals in six games of the international 1975-76 European Cup competition, before Monchengladbach were eliminated in the quarter-finals by Spanish team Real Madrid on the away goals rule.  1977 was the greatest year in Simonsen's career. In the 1976-77 European Cup, Simonsen helped Monchengladbach to the 1977 European Cup Final against English team Liverpool. In the final, Simonsen scored a memorable powerful long range goal to level the game at 1-1, but Monchengladbach eventually lost 3-1. He was subsequently named the 1977 European Footballer of the Year, as the first Danish player in history. The race for the award was tight, and Simonsen squeezed past English midfielder Kevin Keegan by three points and French midfielder Michel Platini by four points to win the prestigious prize. The win was notable, in that Simonsen's native Denmark was not among the top footballing nations in the 1970s, leaving him little room to impress at the international tournaments.  In the following two Bundesliga seasons, Simonsen continued his prolific goalscoring, as Monchengladbach finished 2nd and 8th respectively. He won another international trophy with Monchengladbach in 1979, when he scored eight goals in eight games to guide the club to the final games of the 1978-79 UEFA Cup. He scored the deciding goal in the 2-1 1979 UEFA Cup Final win against Red Star Belgrade. Simonsen had been approached by Spanish club FC Barcelona in 1978, but Monchengladbach refused to let him go. Instead, Simonsen waited for his contract to expire and moved to FC Barcelona in 1979, rejecting offers from Hamburger SV, Juventus, and several Arabian clubs.

Answer the following question by taking a quote from the article: What is the Borussia Monchengladbach?
he was part of the team