CREATE TABLE table_79535 ("Year" FLOAT, "Event" CLOB, "Venue" CLOB, "Place" CLOB, "Weight class  ( kg ) " FLOAT)

What is the lowest weight class (kg) that has sofia, bulgaria as the venue?
SELECT MIN("Weight class (kg)") FROM table_79535 WHERE "Venue" = 'sofia, bulgaria'
SELECT MIN("Weight class (kg)") FROM "table_79535" WHERE "Venue" = 'sofia, bulgaria'