Question: Oscar Fernandes is a confidant of the President of India's Congress, who has served in that role since what year?
Sentence (from "Sonia Gandhi"): Sonia Gandhi (   ; born Edvige Antonia Albina Màino 9 December 1946) is an Italian-born Indian politician, who has served as President of the Indian National Congress party since 1998.
Relevant evidence: Yes