user: Question: If there were 14 in 1990 and 6 survived how many were destroyed?
Columns: ['Aircraft', '1990', 'destroyed', 'damaged', 'to Iran', 'survived']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['France Mirage F1 EQ', 76.0, 23.0, 6.0, 24.0, 23.0]
SQL:

assistant: SELECT "destroyed" FROM "Table" WHERE "1990" = 14.0 AND "survived" = 6.0;