CREATE TABLE table_55715 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

How many average laps did brm complete in grids larger than 12?
SELECT AVG("Laps") FROM table_55715 WHERE "Constructor" = 'brm' AND "Grid" = '12'
SELECT AVG("Laps") FROM "table_55715" WHERE "Constructor" = 'brm' AND "Grid" = '12'