Task: Question Generation
Input (English):  Iola Leroy, or Shadows Uplifted (1892), is the story of Iola Leroy, a beautiful young mixed-race woman of majority white ancestry in the antebellum years. Born free in Mississippi, she and her brother Harry are the children of a wealthy white planter and his mixed-race wife, a former slave whom he freed and married before the American Civil War. (Note: Such interracial marriage was then illegal, although planters wealthy enough sometimes flouted the law). Her father sends Iola to the North to be educated. After his death, Iola is kidnapped, told that she has black blood, and sold into slavery in the Deep South.
In a plot that follows the conventions of the late nineteenth century tragic mulatto genre, Iola struggles to elude the intentions of her various owners to use her sexually. After she is freed by the Union Army during the war, she seeks to find her scattered family members. Embracing her African heritage, she works to improve the social and economic condition of blacks in the United States.
Iola is supported in her struggle by people who relate to various aspects of her complicated life: a devoted former Leroy family slave, Tom Anderson, rescued Iola from a lecherous master. Her brother Harry Leroy joins her in refusing to "pass" as white, although that would make life easier for them. (Note: Both Leroys have a majority of white ancestry.) She meets a newfound uncle, Robert Johnson, who introduces her to her dark-skinned maternal grandmother Harriet, of mostly African descent.
After the war, Leroy continues to identify as black. She declines to pass for white when her New England suitor, Dr. Gresham, makes it a condition of his proposal of marriage. He wants her to promise never to reveal her African ancestry.
Leroy marries Dr. Frank Latimer, a man of mixed ancestry who also identifies with the black community. They return to North Carolina to fight for "racial uplift." After a series of coincidences, Iola Leroy Latimer reunites with her surviving Leroy family members after the war.
Output (English): What is the name of Iola newfound uncle?