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_51628 ( "Year" real, "Date" text, "Type" text, "EU Council presidency" text, "President-in-Office" text, "Host city" text )

### Question ###
In which host city was Margaret Thatcher the President-in-Office in 1981?

### Accurate SQL ###

SELECT "Host city" FROM table_51628 WHERE "President-in-Office" = 'margaret thatcher' AND "Year" = '1981'