CREATE TABLE table_11391 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

How many laps are associated with a time of + 1:39.591?
SELECT "Laps" FROM table_11391 WHERE "Time/Retired" = '+ 1:39.591'
SELECT "Laps" FROM "table_11391" WHERE "Time/Retired" = '+ 1:39.591'