Complex sentence: Elizabeth Jennings Graham (1830--1901) became a 19th-century African-American civil rights figure after she insisted on her right to ride on a New York City streetcar in 1854.
Split into simpler sentences: Elizabeth Jennings Graham (1830--1901) was a black woman who lived in New York City. She figured in an important early civil rights case, when she insisted on her right to ride on a streetcar in 1854.