CREATE TABLE table_31836 ("Heat Rank" FLOAT, "Lane" FLOAT, "Swimmer" TEXT, "Country" TEXT, "Time" FLOAT, "Overall Rank" TEXT)

Tell me the least time for apostolos tsagkarakis for lane less than 6
SELECT MIN("Time") FROM table_31836 WHERE "Swimmer" = 'apostolos tsagkarakis' AND "Lane" < '6'
SELECT MIN("Time") FROM "table_31836" WHERE "Lane" < '6' AND "Swimmer" = 'apostolos tsagkarakis'