sentences:  In 1957, it was estimated that the industries related to the stockyards employed fully one-half of Omaha workers.That same year the Omaha Chamber of Commerce said that "Livestock is Omaha’s lifeblood," and by 1959 the "Omaha World-Herald" said that the industry was "the backbone of Omaha's economy ever since the first steer trotted into its pens in 1884.