Question:
Who was the chair of Confederation of Independent Trade Unions of Luxembourg in Oct, 1998?

Context:
 John Castegnaro is the chair of Confederation of Independent Trade Unions of Luxembourg from Jan, 1979 to Jan, 2004. 
 André Roeltgen is the chair of Confederation of Independent Trade Unions of Luxembourg from Jan, 2014 to Jan, 2019. 
 Nora Back is the chair of Confederation of Independent Trade Unions of Luxembourg from Jan, 2019 to Dec, 2022. 
 Jean-Claude Reding is the chair of Confederation of Independent Trade Unions of Luxembourg from Jan, 2004 to Jan, 2014.

Answer:
John Castegnaro