Complex sentence: Jane Johnson (c.1814-1827--August 2,1872) was an African-American slave whose escape to freedom while in Philadelphia, aided by abolitionists, resulted in acrimonious and precedent-setting legal cases in 19th-century Pennsylvania.
Split into simpler sentences: Jane Johnson (c.1814-1827--August 2,1872) was an African-American slave who escaped to freedom while in Philadelphia, aided by abolitionists. This resulted in precedent-setting legal cases in 19th-century Pennsylvania.