Original sentence: Calment's age has been challenged by researchers who allege her daughter Yvonne assumed her identity in 1934.For over two decades, Calment held the status of oldest verified person ever.Jeanne Louise Calment (; 21 February 1875 – 4 August 1997) was a French woman from Arles who was a supercentenarian and the oldest human whose age was well-documented, with a reputed lifespan of 122 years and 164 days.Other researchers have criticised this hypothesis
Edited sentence: For over two decades, Calment has held the status of oldest verified person ever.However, this hypothesis had already been examined and rejected as part of the initial investigation into Calment's age in the 1990s.In 2018, Calment's age was challenged by some Russian researchers who alleged her daughter Yvonne had assumed her identity in 1934.Jeanne Louise Calment (; 21 February 1875 – 4 August 1997) was a French woman from Arles who was a supercentenarian and the oldest human whose age was well-documented, with a proven lifespan of 122 years and 164 days