CREATE TABLE table_8897 ("Heat" FLOAT, "Lane" FLOAT, "Name" TEXT, "Country" TEXT, "Mark" TEXT)

What is the average heat that has 52.83 sb mark and lane less than 4?
SELECT AVG("Heat") FROM table_8897 WHERE "Mark" = '52.83 sb' AND "Lane" < '4'
SELECT AVG("Heat") FROM "table_8897" WHERE "Lane" < '4' AND "Mark" = '52.83 sb'