CREATE TABLE table_79127 ("Date" TEXT, "Time  ( UTC ) " TEXT, "Epicenter" TEXT, "Magnitude" TEXT, "Depth" TEXT, "Intensity" TEXT)

What is the magnitude with epicenter at Vrancea County, unknown intensity and which happened at 06:36?
SELECT "Magnitude" FROM table_79127 WHERE "Epicenter" = 'vrancea county' AND "Intensity" = 'unknown' AND "Time (UTC)" = '06:36'
SELECT "Magnitude" FROM "table_79127" WHERE "Epicenter" = 'vrancea county' AND "Intensity" = 'unknown' AND "Time (UTC)" = '06:36'