Question: Who is the GC leader when Laurent Jalabert was the stage winner and the stage was greater than 6?
SQL: SELECT "GC Leader" FROM "2-15166170-1" WHERE "Stage Winner" = 'Laurent Jalabert' AND "Stage" > 6.0;

Question: When did stage 5 occur?
SQL: SELECT "Date" FROM "2-15166170-1" WHERE "Stage" = 5.0;