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_27 (margin VARCHAR, date VARCHAR)

### Question ###
What is the Margin, when Date is 19 July 2008 (Round 19)?

### Accurate SQL ###

SELECT margin FROM table_name_27 WHERE date = "19 july 2008 (round 19)"