Complex sentence: After its publication in 1872, "Who Would Have Thought It?" remained relatively unnoticed for over one hundred years in American literary studies, demonstrating the lack of influence that Mexican-Americans had in the making of American history.
Split into simpler sentences: After its publication in 1872, "Who Would Have Thought It?" remained relatively unnoticed for over a hundred years in American literary studies. This demonstrated the lack of influence that the Mexican-American's had in the making of American History.