Original sentence: ADC Aircraft, a British firm established in March 1920 to take advantage of the large number of World War I-surplus military aircraft on the market.Aid to Dependent Children, an American government social program from 1935-1960
Edited sentence: ADC Aircraft, a British firm established in March 1920 to take advantage of the large number of World War I–surplus military aircraft on the market.Aid to Dependent Children, an American government social program from 1935–1960