Thomas Gatch Melish (October 28, 1876 – February 15, 1948) was a Cincinnati entrepreneur and coin collector.
 In the 1930s, Melish was responsible for two United States commemorative coin issues, the Cincinnati Musical Center half dollar and the Cleveland Centennial half dollar.
The Cleveland Centennial half dollar is a commemorative United States half dollar struck at the Philadelphia Mint in 1936 and 1937, though all bear the earlier date.
 Sometimes known as the Cleveland Centennial Great Lakes Exposition half dollar, it was issued to mark the 100th anniversary of Cleveland, Ohio, as an incorporated city, and in commemoration of the Great Lakes Exposition, held in Cleveland in 1936.
Ice hockey has been a key element of Canada's cultural and social history.
 This has been captured on various releases from Canada Post.
 In 1956 Canada Post Office released a 5¢ stamp paying tribute to Canadian hockey players for "the prestige they have earned for Canada in international competition."
 Releases of the late 20th Century included the commemoration of the XV Olympic Winter Games held in Calgary, a three stamp set honouring the 75th Anniversary of the National Hockey League, the 100th Anniversary of the Stanley Cup, and the 25th Anniversary of the 1972 Summit Series.
 In the 2000s, the key release has been the series of National Hockey League All-Stars.
 The series lasted from 2000 to 2005.
 Other hockey issues have included a commemorative envelope to commemorate the 25th Anniversary of the International Postal Hockey Tournament and a stamp to commemorate the 2002 Winter Olympics in Salt Lake City, Utah featured a hockey player.
The United States Commemorative Coin Act of 1996 (Public Law 104-329) is a United States federal law which established a commemorative coin program within the United States Mint in 1996.
 In addition, the law specifically authorized commemorative coins to observe the 150th anniversary of the death of Dolley Madison, to honor George Washington, the 125th anniversary of the establishment Yellowstone National Park, and the 50th anniversary of Jackie Robinson's racial desegregation of Major League Baseball.
 It also established commemorative coin fundraising programs for the Black Revolutionary War Patriots Memorial, Franklin Delano Roosevelt Memorial, and National Law Enforcement Officers Memorial.
The organization was celebrating the 100th anniversary of its founding in 1909.
 The Montreal Canadiens hosted the 57th NHL All-Star Game at the Bell Centre on January 25, 2009, and the 59th NHL Entry Draft in June 2009 as part of the team's celebrations for its centennial.
 While many make the mistake of believing that the 2008–09 marked the 100 years, it was actually December 4, 2009 that was the 100th anniversary of the team.
The ten shilling (10s) (Irish: "deich scilling" ) coin was a one-off commemorative coin issued in Ireland in 1966 to mark the 50th anniversary of the Easter Rising.
 Ten shillings was a subdivision of the pre-decimal Irish pound, worth ⁄ of an Irish pound, making this the highest value coin in the pre-decimal system.
The Eisenhower Commemorative Dollar is a United States commemorative coin minted in 1990 to celebrate the 100th Anniversary of the birth of General/President Dwight D. Eisenhower.
 This coin is not to be confused with the Eisenhower Dollar which was a regular issue American coin.
The Alabama Centennial half dollar, or Alabama half dollar, was a commemorative fifty-cent coin struck by the United States Bureau of the Mint in 1921 as a belated acknowledgement of the 100th anniversary of Alabama's admission to the Union in 1819.
 The coin was created by Laura Gardin Fraser, who became the first woman designer of a coin.
The Centenario is a Mexican gold bullion coin first minted in 1921 to commemorate the 100th anniversary of Mexico's independence from Spain.
 The coin is not intended to be used as currency; the face value of 50 pesos is for legal purposes only, and does not reflect the actual value of the gold content.
Significant events of national importance have been occasions for the issue of commemorative notes in Sri Lanka.
 The Central Bank of Sri Lanka has issued two commemorative notes.
 In 1998 a 200 rupee note was issued on Independence day to commemorate the 50th Independence Anniversary of the country.
 The note was issued along with three commemorative coins; a five thousand rupee gold coin, a one thousand rupee silver coin, a ten rupee bi-metallic coin.
 The 200 rupee note was the first time a Sri Lankan note had been issued in polymer plastic produced by note printing Australia.
 The artwork was done by Ananda Somathilake and Gamini Mendis.
 Only a limited number of notes were issued.
 The note is being removed from circulation, and is rarely seen.
 Currently about 3% of the ~20.5 million notes issued are in circulation or with collectors.

Question: What coin was Melish responsible for was issued to mark the 100th anniversary of Cleveland?
Answer: Cleveland Centennial Great Lakes Exposition half dollar