Question: The arena home to the Cleveland Monsters, replaced a stadium opened in what year?

Context paragraphs:
Alfond Stadium (University of Maine): Morse Field at Harold Alfond Sports Stadium is a 10,000-seat multi-purpose stadium in Orono, Maine.  The stadium opened as Alumni Field in 1947 and underwent extensive renovations from 1996 to 1998.  It is home to the University of Maine Black Bears football team.  The wood and steel grandstands, built in the 1940s, were condemned and demolished in 1996, replaced with the current east grandstand, along with a temporary structure on the west side, adjacent to Alfond Arena.  The current west grandstand, lights, press and luxury levels, as well as concessions and restroom amenities were completed prior to the 1998 season.  The stadium was rededicated to Harold Alfond, a longtime Maine booster, at Maine's first home night game on September 12, 1998, a 52-28 win over New Hampshire in the Battle for the Brice-Cowell Musket.  The field is named for Phillip and Susan Morse, who donated the lights, original Astroturf and scoreboard.  In the summer of 2008, new FieldTurf was installed to replace the old AstroTurf.  In 2014, a 20'x32' high-definition video-board replaced the matrix display installed in 1998, and a contemporary scoreboard was installed on the north end.

Cleveland Stadium: Cleveland Stadium, commonly known as Municipal Stadium or Lakefront Stadium, was a multi-purpose stadium located in Cleveland, Ohio.  It was one of the early multi-purpose stadiums, built to accommodate both baseball and football.  The stadium opened in 1931 and is best known as the long-time home of the Cleveland Indians of Major League Baseball, from 1932 to 1993, and the Cleveland Browns of the National Football League (NFL), from 1946 to 1995, in addition to hosting other teams, sports, and being a regular concert venue.  The stadium was a four-time host of the Major League Baseball All-Star Game, one of the host venues of the 1948 and 1954 World Series, and the site of the original Dawg Pound, Red Right 88, and The Drive.

Cleveland Cavaliers: The Cleveland Cavaliers, also known as the Cavs, are an American professional basketball team based in Cleveland, Ohio.  The Cavs compete in the National Basketball Association (NBA) as a member of the league's Eastern Conference Central Division.  The team began play as an expansion team in 1970, along with the Portland Trail Blazers and Buffalo Braves.  Home games were first held at Cleveland Arena from 1970 to 1974, followed by the Richfield Coliseum from 1974 to 1994.  Since 1994, the Cavs have played home games at Quicken Loans Arena in downtown Cleveland, which is shared with the Cleveland Gladiators of the Arena Football League and the Cleveland Monsters of the American Hockey League.  Dan Gilbert has owned the team since March 2005.

Quicken Loans Arena: Quicken Loans Arena, commonly known as "The Q", is a multi-purpose arena in downtown Cleveland, Ohio, United States.  The building is the home of the Cleveland Cavaliers of the National Basketball Association (NBA), the Cleveland Monsters of the American Hockey League, and the Cleveland Gladiators of the Arena Football League.  It also serves as a secondary arena for Cleveland State Vikings men's and women's basketball.

KeyBank Center: KeyBank Center, formerly known as Marine Midland Arena, HSBC Arena and First Niagara Center, is a multipurpose indoor arena located in downtown Buffalo, New York.  It is the largest indoor arena in Western New York, seating 19,070 fans in its normal configuration, and was constructed primarily for the Buffalo Sabres of the National Hockey League (NHL), who have called the arena home since 1996, when it replaced the now-demolished Memorial Auditorium.  The arena was renamed as KeyBank Center starting with the 2016–2017 NHL season.  It is owned by Erie County and operated by Pegula Sports and Entertainment (as Hockey Western New York, LLC).

Dan Gilbert: Daniel Gilbert (born 17 January 1962) is the chairman and founder of Rock Ventures and Quicken Loans Inc., the owner of the National Basketball Association's Cleveland Cavaliers, the American Hockey League's Cleveland Monsters, the Arena Football League's Cleveland Gladiators and the NBA Development League's Canton Charge.  He is also the operator of the Quicken Loans Arena in Cleveland, Ohio and chairman of JACK Entertainment (formerly Rock Gaming), which opened its first Horseshoe Casino (now JACK Cleveland Casino) in downtown Cleveland in May 2012.

Sports in Cleveland: Cleveland's professional sports teams include the Cleveland Indians (Major League Baseball), Cleveland Browns (National Football League), Cleveland Cavaliers (National Basketball Association), Cleveland Monsters (American Hockey League), and the Cleveland Gladiators (Arena Football League).  Local sporting facilities include Progressive Field, FirstEnergy Stadium, Quicken Loans Arena and the Wolstein Center.

Cleveland Gladiators: The Cleveland Gladiators are an arena football team based in Cleveland, Ohio, United States, who play in the Arena Football League (AFL) as part of the AFL National Conference.  The Gladiators play their home games at Quicken Loans Arena, which they share with the Cleveland Cavaliers of the National Basketball Association and the Cleveland Monsters of the American Hockey League.  The franchise was originally based in East Rutherford, New Jersey, and then later in Las Vegas, Nevada, before relocating to Cleveland for the 2008 AFL season.  The Gladiators have qualified for the playoffs eight times in their history, reaching the ArenaBowl for the first time in 2014.

Cleveland Monsters: The Cleveland Monsters are a professional ice hockey team in the American Hockey League (AHL) based in Cleveland, Ohio, United States.  The team began play in 2007 as the Lake Erie Monsters and since 2015 has served as the top affiliate of the Columbus Blue Jackets of the National Hockey League (NHL).  The Monsters play home games at Quicken Loans Arena in downtown Cleveland and have one Calder Cup championship, after winning their first title in 2016.

Richfield Coliseum: Richfield Coliseum, also known as the Coliseum at Richfield, was an indoor arena located in Richfield Township, between Cleveland and Akron, Ohio.  It opened in 1974 as a replacement for the Cleveland Arena, and had a seating capacity of 20,273 for basketball.  It was the main arena for the Northeast Ohio region until 1994, when it was replaced by Quicken Loans Arena in downtown Cleveland.  The Coliseum stood vacant for five years before it was purchased and demolished in 1999 by the National Park Service.  The site of the building was converted to a meadow and is now part of Cuyahoga Valley National Park.

Supporting paragraphs: Richfield Coliseum Quicken Loans Arena
Answer: 1974