Table:
text: 1998 Vuelta a España
Stages
Stages
Stage Date_ Course Distance Winner GC_Leader
18 23 September León - Salamanca 223 Fabrizio Guidi Abraham Olano
19 24 September Ávila - Segovia 1704 Roberto Heras Abraham Olano
20 25 September Segovia - Alto de Navacerrada 206 Andrei Zintchenko José María Jiménez
21 26 September Fuenlabrada 39 ( ITT ) Alex Zülle Abraham Olano
22 27 September Madrid 163 Markus Zberg Abraham Olano

Question: Who is the GC leader at the 1998 Tour of Spain in Avila-Segovia?