Table: tour_de_france_1986
Columns: stage
date
route
terrain
length
winner

Question: What was the terrain for stage 10 of the tour?
SQL: SELECT "terrain" FROM tour_de_france_1986 WHERE "stage" = '10'

Question: Which stage took the tour through Boulogne-Billancourt?
SQL: SELECT "stage" FROM tour_de_france_1986 WHERE "route" = 'boulogne-billancourt'

Question: Who won at stage 22?
SQL: SELECT "winner" FROM tour_de_france_1986 WHERE "stage" = '22'

Question: Who was the winner of stage 12?
SQL: SELECT "winner" FROM tour_de_france_1986 WHERE "stage" = '12'