context: Garang refused to take part in the transitional government in 1985 or the 1986 elections, and remained a rebel leader. However, the SPLA and the government signed a peace treaty on 9 January 2005 in Nairobi, Kenya. On July 9, 2005, he was sworn in as vice president, the second-highest ranking in the country, following a ceremony in which he and President Omar al-Bashir signed the constitution of power-sharing. He was also the leader of the southern Sudanese autonomous regime for six years before the referendum on the possibility of a referendum. No Christian or man from the south has ever held such a high position in government. Speaking after the ceremony, Garang said, "I congratulate the Sudanese people. This is not my peace or the peace of al-Bashir, it is the peace of the Sudanese people."
question: Dr. John Garang de Mabior was the first Vice President of Sudan under the leadership of which president?
answers.text: Omar al-Bashir