Question: 1991 Dakar Rally also known as the 1991 Paris–Dakar Rally was the 13th running of the Dakar Rally event won by 1981 world rally champion, Ari Vatanen, who since 2013 has been the President of  what union?
Sentence (from "2002 Arras–Madrid–Dakar Rally"): The format of the rally was revised for 2002 with the introduction of two-day stages and two stages without the use of navigation aids.
Relevant evidence: No