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_68 (first_day_cover_cancellation VARCHAR, denomination VARCHAR, date_of_issue VARCHAR)

### Question ###
What's the First Day Cover Cancellation with Denomination of $0.50 and Date of Issue as 13 June 2005?

### Accurate SQL ###

SELECT first_day_cover_cancellation FROM table_name_68 WHERE denomination = "$0.50" AND date_of_issue = "13 june 2005"