Q: In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Passage: Born near Mehoopany, Wyoming County, Pennsylvania, Harris was the son of Emer Harris and Deborah Lott. He was a nephew of Martin Harris, one of the Three Witnesses to the Book of Mormon, and a descendant of Thomas Harris, companion in exile of Roger Williams, and one of the founders of Providence, Rhode Island. Harris was baptized a member of Church of Jesus Christ of Latter Day Saints in September 1842, by Milton Stow, near Nauvoo, Illinois. Harris served as a guard in Nauvoo to protect Joseph Smith against mob violence. He also served in the Nauvoo Legion and witnessed the laying of the cornerstone of the Nauvoo Temple. After being driven with other Latter-day Saints from Nauvoo in 1846, he resided temporarily in St. Louis, Missouri until 1850, when he went to Kanesville, Iowa and then to Utah.
Link Information:

The joint statement of the Three WitnessesOliver Cowdery, Martin Harris, and David Whitmer Answer: Oliver Cowdery, Martin Harris, and David Whitmer
A:
Who were the Three Witnesses to the Book of Mormon?