CREATE TABLE table_45541 ("Driver" CLOB, "Team" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT, "Points" FLOAT)

What was the highest lap count for Walker Racing with a grid larger than 15?
SELECT MAX("Laps") FROM table_45541 WHERE "Team" = 'walker racing' AND "Grid" > '15'
SELECT MAX("Laps") FROM "table_45541" WHERE "Grid" > '15' AND "Team" = 'walker racing'