Question: Who is the person who has lived the longest?
Disambiguated questions and answers: question: Who is the person who has lived the longest, but whose age is not verified?
Who is the person who has lived the longest, and whose age is verified?
What person who is currently alive has lived the longest?
answer: Jeanne Calment
Sarah Knauss
Kane Tanaka
question: Who was independently verified to have lived the longest?
Who is undisputed as the longest living person?
answer: Jean Calment
Sarah Knauss
Natural Questions answer: Jeanne Calment of France (from the Wikipedia article "Oldest people")