Complex sentence: It was designed and financed by Dr Fred Stark Pearson, a British engineer, and took over 1,500 men, mostly Mexicans with experience bulding other dams for Dr Pearson, two years to build the dam while working 24 hours a day.
Split into simpler sentences: It was designed and financed by Dr Fred Stark Pearson, a British engineer. It took over 1,500 men, mostly Mexicans with experience bulding other dams for Dr Pearson, two years to build the dam while working 24 hours a day.