user: Question: Which carrier was deployed on 18 July 1968?
Columns: ['from', 'aircraft', 'carrier', 'air wing', 'tail code', 'area']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['7 June 1962', 'A4D-2', 'CVA-34', 'CVG-16', 'AH-3xx', 'WestPac']
SQL:

assistant: SELECT "carrier" FROM "Table" WHERE "from" = '18 July 1968';