Question: In which year did this steel and shipbuilding company, one of America's largest steel producers and shipbuilders, which contributed to the launching of USS Cherokee begin operations?

Context paragraphs:
Anshan: Anshan () is the third largest prefecture-level city in Liaoning province, People's Republic of China.  Situated in the central area of the province, Anshan is about 92 km south of Shenyang, the provincial capital.  Anshan is on the boundary between the Mountains of eastern Liaoning and the plains of the west.  The prefecture has a population of 3,584,000 people and covers an area of about 9,252 km2 .  The distance from the east to the west of the prefecture is 133 km .  The area contains the famous Qianshan National Park.  The city's name is derived from the shape of a nearby mountain that resembles the shape of a horse's saddle, which can be seen on the left (west) about five minutes before the northbound train arrives at Anshan Station.  Anshan is home to the Anshan Iron and Steel Group, one of the largest steel producers in China.  Anshan is sister cities with Sheffield

Bethlehem Steel: The Bethlehem Steel Corporation (commonly called Bethlehem Steel) was a steel and shipbuilding company that began operations in 1904 and was America's second-largest steel producer and largest shipbuilder.

Dongkuk Steel: Dongkuk Steel Mill Co, Ltd. () is a steel company with its headquarters in the city of Seoul, South Korea.  Its manufacturing plants are located in Pohang, Incheon, Dangjin and Busan.  Main products are steel plates mainly for shipbuilding, beams, sections and bars mainly for construction.  Dongkuk Steel is the parent company of the Dongkuk Steel Group with several subsidiaries including Union Steel.  Dongkuk Steel Mill is the second largest EAF steel producer in Korea behind Hyundai Steel.  Also Dongkuk Steel mill is world's forty-ninth largest steel maker among IISI member companies(2009).  The current chairman is Mr. Sae Joo Chang.  The company is a member of the Dongkuk Steel Group.

World Steel Association: World Steel Association, often abbreviated as worldsteel, is the international trade body for the iron and steel industry.  The association represents over 150 steel producers (including 9 of the world's 10 largest steel companies), national and regional steel industry associations and steel research institutes.  World Steel Association members represent around 85% of world steel production.

Scotstoun Marine Ltd: Scotstoun Marine Ltd was a shipbuilding company in Glasgow, Scotland, on the River Clyde, formed in 1972 to operate the former shipyard of Charles Connell and Company following the collapse of Upper Clyde Shipbuilders into which it had been amalgamated.  Scotstoun Marine Ltd operated as a subsidiary of Govan Shipbuilders.  The yard constructed 15 ships between 1972 and 1980 when the yard closed after 119 years of shipbuilding in which 535 ships had been built.

Manitowoc Shipbuilding Company: Manitowoc Shipbuilding Company, located in Manitowoc, Wisconsin, was a major shipbuilder for the Great Lakes.  It was founded in 1902, and made mainly steel ferries and ore haulers.  During World War II, it built submarines, tank landing craft (LCTs), and self-propelled fuel barges called "YOs".  Employment peaked during the military years at 7000.  The shipyard closed in 1968, when Manitowoc Company bought Bay Shipbuilding Company and moved their shipbuilding operation to Sturgeon Bay.

BAE Systems Maritime – Naval Ships: BAE Systems Maritime – Naval Ships is a wholly owned subsidiary company of BAE Systems plc, specialising in naval surface shipbuilding and combat systems integration.  One of three divisions of BAE Systems Maritime, along with BAE Systems Maritime – Submarines and BAE Systems Maritime – Maritime Services, it is the largest shipbuilding company in the United Kingdom, one of the largest shipbuilders in Europe, and one of the world's largest builders of complex warships.

Davie Shipbuilding: Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec, Canada.  The facility is now operating as Chantier Davie Canada Inc.  Davie is Canada's largest and highest capacity shipyard and one of the largest shipbuilders in North America.

Mittal Steel Company: Mittal Steel Company N.V. was one of the world's largest steel producers by volume, and also one of the largest in turnover.  The company is now part of ArcelorMittal.

USS Cherokee (AT-66): USS "Cherokee" (AT-66) was a US Navy fleet tug of the "Navajo" class , later renamed the "Cherokee" class .  She was launched on 10 November 1939 by Bethlehem Shipbuilding Corp., Staten Island, New York and sponsored by Miss E. Mark; and commissioned 26 April 1940, Lieutenant Commander P. L. F. Weaver in command.  "Cherokee" served during World War II in the North African campaign.  She was redesignated ATF-66 on 15 May 1944.

Supporting paragraphs: USS Cherokee (AT-66) Bethlehem Steel
Answer: 1904