Complex sentence: In 1891, she refused to compete in a design competition for the Women's Building at the World's Columbian Exposition in Chicago because men were paid $10,000 to design buildings for the fair while the women got only $1,000.
Split into simpler sentences: In 1891, she refused to compete in a design competition for the Women's Building at the World's Columbian Exposition in Chicago because of the difference in how male and female architects were treated. The men were paid $10,000 to design buildings for the fair, while the women got only $1,000.