CREATE TABLE table_70812 ("Heat" FLOAT, "Lane" FLOAT, "Name" TEXT, "Nationality" TEXT, "Time" TEXT)

What is the highest lane for heat 6 with a time of dns?
SELECT MAX("Lane") FROM table_70812 WHERE "Heat" = '6' AND "Time" = 'dns'
SELECT MAX("Lane") FROM "table_70812" WHERE "Heat" = '6' AND "Time" = 'dns'