Question: How many people does the stadium that housed the 2007 Rhein Fire hold?

Context paragraphs:
2002 El Ayyat railway accident: The El Ayyat train disaster happened at 02:00 on the morning of 20 February 2002 in an eleven-carriage passenger train travelling from Cairo to Luxor.  A cooking gas cylinder exploded in the fifth carriage, creating a fire which engulfed seven third-class carriages, reducing them almost to cinders.  The initial number of dead given by officials at the time was 383, all Egyptians.  However, considering that seven carriages were burnt to the ground, and each carriage was packed with at least double the maximum carrying capacity of 150, this number is considered by many people to be a great underestimate.  The dubious nature of the given death toll lies with the absence of a full passenger list; accounting for those missing was almost impossible at the time.  In addition, the fire was so intense and the carriages so badly burned that many corpses had been reduced to ash.  As there was no means of communication between the driver and the rear carriages, the driver did not know of the fire until about two hours after it had begun, resulting in many people, attempting to flee from the overcrowded carriages, jumping to their death.  Some important Egyptians have commentated that the official number of 383 dead is grossly inaccurate and was an attempt to lessen the damage done to the reputation of the government.  Many people consider a number of about 1000 deaths to be more accurate.

Esprit Arena: Esprit Arena (stylized as ESPRIT arena), known previously as the "LTU Arena" (until June 2009), and as the "Düsseldorf Arena" (during the 2011 Eurovision Song Contest), is a multi-functional football stadium in Düsseldorf, Germany.  The stadium holds 54,600 and has a closable roof.  Its special heating system allows the stadium to host comfortable events at the height of winter.

2002 Rhein Fire season: The 2002 Rhein Fire season was the eighth season for the team in the NFL Europe League (NFLEL).  The team was led by head coach Pete Kuharchek in his second year, and played its home games at Rheinstadion in Düsseldorf, Germany.  They finished the regular season in first place with a record of seven wins and three losses.  In World Bowl X, Rhein lost to the Berlin Thunder 26–20.

World Bowl '98: World Bowl '98 (also referred to as World Bowl VI) was the sixth championship game of the NFL Europe League.  It was held at Waldstadion in Frankfurt, Germany on Sunday, June 14, 1998.  The game was between the Frankfurt Galaxy, who finished the season in first place with a record of 7–3, and the second-placed Rhein Fire, which finished with a 7–3 record as well.  47,846 spectators were in attendance, the largest World Bowl crowd since 1991, when the Fire captured its first league title by defeating the Galaxy 34–10.  Rhein's quarterback Jim Arellanes, filling in for injured Mike Quinn, earned MVP honors in his first start by completing 12 of 18 passing attempts for 263 yards and three touchdowns.

2007 Rhein Fire season: The 2007 Rhein Fire season was the 13th and final season for the franchise in the NFL Europa League (NFLEL).  The team was led by head coach Rick Lantz in his first year, and played its home games at LTU arena in Düsseldorf, Germany.  They finished the season in fourth place with a record of four wins and six losses.  The National Football League (NFL) announced the closure of its European branch on June 29, ending the team's 13-year existence.

Pete Kuharchek: Peter C. Kuharchek (born November 12, 1947) is a former American football player and coach, whose coaching career spanned over 40 years at the high school, collegiate and professional levels.  He was the head coach for the Rhein Fire of the NFL Europe League (NFLEL) from 2001 to 2005, compiling a record of 24 wins and 28 losses.  At the collegiate level, he most notably served as defensive coordinator at the University of Memphis from 1987 to 1989, and the University of Texas at El Paso (UTEP) from 1994 through 1995.  Besides his tenure in the NFLEL — which also included stints as assistant for the Orlando Thunder (1992) and Rhein Fire (1996–2000) — Kuharchek worked in four other professional leagues — including the United States Football League (USFL), Canadian Football League (CFL), Arena Football League (AFL), and United Football League (UFL).  Most notably, he was the defensive coordinator for the CFL's Toronto Argonauts in 2009.

1997 Rhein Fire season: The 1997 Rhein Fire season was the third season for the franchise in the World League of American Football (WLAF).  The team was led by head coach Galen Hall in his third year, and played its home games at Rheinstadion in Düsseldorf, Germany.  They finished the regular season in first place with a record of seven wins and three losses, marking the first winning season in franchise history.  In World Bowl '97, Rhein lost to the Barcelona Dragons 38–24.  Quarterback T. J. Rubley earned all-World League honors and was named the league's offensive most valuable player.

2000 Rhein Fire season: The 2000 Rhein Fire season was the sixth season for the franchise in the NFL Europe League (NFLEL).  The team was led by head coach Galen Hall in his sixth year, and played its home games at Rheinstadion in Düsseldorf, Germany.  They finished the regular season in first place with a record of seven wins and three losses, qualifying for the league final for the third time in four years.  Rhein won the second championship in team history by defeating the Scottish Claymores 13–10 in World Bowl 2000.

1998 Rhein Fire season: The 1998 Rhein Fire season was the fourth season for the franchise in the NFL Europe League (NFLEL).  The team was led by head coach Galen Hall in his fourth year, and played its home games at Rheinstadion in Düsseldorf, Germany.  They finished the regular season in second place with a record of seven wins and three losses.  Rhein won the first championship in team history by defeating the Frankfurt Galaxy 34–10 in World Bowl '98.

2003 Rhein Fire season: The 2003 Rhein Fire season was the ninth season for the franchise in the NFL Europe League (NFLEL).  The team was led by head coach Pete Kuharchek in his third year, and played its home games at Arena AufSchalke in Gelsenkirchen, Germany.  They finished the regular season in second place with a record of six wins and four losses.  In World Bowl XI, Rhein lost to the Frankfurt Galaxy 35–16.

Supporting paragraphs: 2007 Rhein Fire season Esprit Arena
Answer: 54,600