Table: race_results_1986
Columns: race
date
location
pole_position
fastest_lap
race_winner
constructor
report

Question: What was the race with nigel mansell winning in estoril?
SQL: SELECT "race" FROM race_results_1986 WHERE "race_winner" = 'nigel mansell' AND "location" = 'estoril'

Question: What was the pole position for the belgian grand prix?
SQL: SELECT "pole_position" FROM race_results_1986 WHERE "race" = 'belgian grand prix'

Question: Who won the australian grand prix?
SQL: SELECT "race_winner" FROM race_results_1986 WHERE "race" = 'australian grand prix'

Question: What was the pole position for jerez?
SQL: SELECT "pole_position" FROM race_results_1986 WHERE "location" = 'jerez'