user: Question: Which is the category of the group was establishe in 1990?
Columns: ['Event Name', 'Established', 'Category', 'Sub Category', 'Main Venue']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Dieppe Kite International .', 2001.0, 'Sporting', 'Kite flying', 'Dover Park']
SQL:

assistant: SELECT "Category" FROM "Table" WHERE "Established" = 1990.0;