Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_67 ( magnitude VARCHAR, time__utc_ VARCHAR, epicenter VARCHAR, intensity VARCHAR )

### Question ###
What is the magnitude with epicenter at Vrancea County, unknown intensity and which happened at 06:36?

### Accurate SQL ###

SELECT magnitude FROM table_name_67 WHERE epicenter = "vrancea county" AND intensity = "unknown" AND time__utc_ = "06:36"