Table: f1_1988_race_results
Columns: grand_prix
date
location
pole_position
fastest_lap
winning_driver
constructor
report

Question: What date is the Portuguese Grand Prix?
SQL: SELECT "date" FROM f1_1988_race_results WHERE "grand_prix" = 'portuguese grand prix'

Question: Which winning driver is located in Imola?
SQL: SELECT "winning_driver" FROM f1_1988_race_results WHERE "location" = 'imola'

Question: What is the Pole Position of the Portuguese Grand Prix?
SQL: SELECT "pole_position" FROM f1_1988_race_results WHERE "grand_prix" = 'portuguese grand prix'