Question: Lincoln the Unknown is a biography of Abraham Lincoln, written in what year, by Dale Harbison Carnegie, was an American writer and lecturer and the developer of famous courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills?
Sentence (from "Dale Carnegie"): Dale Harbison Carnegie ( ; spelled Carnagey until c. 1922; November 24, 1888 – November 1, 1955) was an American writer and lecturer and the developer of famous courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills.
Relevant evidence: Yes