CREATE TABLE table_name_67 (magnitude VARCHAR, time__utc_ VARCHAR, epicenter VARCHAR, intensity VARCHAR)

What is the magnitude with epicenter at Vrancea County, unknown intensity and which happened at 06:36?
SELECT magnitude FROM table_name_67 WHERE epicenter = "vrancea county" AND intensity = "unknown" AND time__utc_ = "06:36"
SELECT "magnitude" FROM "table_name_67" WHERE "06:36" = "time__utc_" AND "epicenter" = "vrancea county" AND "intensity" = "unknown"